I know rare has said time and time again that SoT will not have PvE servers and it's honestly a shame. Now before you tell me how wrong I am about this, let me go over a few things.
SoT is a pirate game and because of this people believe PvP is the core foundation of this game and I agree. The appeal many people reference when against PvE is that the game is unpredictable, you've got to watch your back, you can never really trust anyone, and in some cases kill or be killed. That's great, it's an amazing thing about SoT, you want to feel like you fought a good fight and earned your plunder. This also happens to be a massive cripple on the beautiful game rare created. It's detrimental to new players, often leaving them with their first experience being one filled with unfair fights, spawn camping, and general confusion. This then turns many players away from the game. Every now and then I'll convince my friends to hop on SoT and every time our session ends the same way: our ship with no loot is lit on fire as a group of pirates spawn camp us. It only gets harder to convince friends to play again, and it typically takes months for me to finally get them back into a game.
My friends pretty much always bring up the idea of PvE servers when this happens. And I know what your thinking, they just need to give it time, get good and stand up for themselves. This is a pirate game not a sailing game. However, this argument is inherently flawed. The truth is, new players to your game aren't having fun. Games are supposed to be fun. Now I know some new players pick it up and love it, but a majority of people only get a taste and are immediately pushed away. It's unfortunate.
But it doesn't have to be this way, there is a workaround: PvE servers. To clarify, I believe a PvE server would be an invite only world, just you and any friends you want, no PvP, and shared loot. This would essentially be a private server but you can still progress. Given that progression has no effect on anything other then cosmetics really I don't see any harm in it. The argument is made that it isn't really SoT anymore. You are right in a sense, there aren't players to interact with but it can still easily be an engaging pirate game. There are skeleton ships, tall tales, events, bosses, monsters, etc. all there waiting for you. This gives players time to appreciate and understand the game before being thrown in with experienced pirates.
Then we have to address the idea of an empty PvP server. This is probably the biggest argument against PvE servers; the normal adventure world already feels empty. Experienced pirates can't find anybody to steal from. It is in this issue, PvE servers will actually really help. The original adventure mode is the way SoT is meant to be played, good old PvPvE. Therefore there is no worry that the original adventure mode would be empty. The PvE option would create a bigger platform for this game, bringing in and keeping new players. Any players it takes from the original adventure mode are players who aren't willing to fight anyways, it's a passive player that dies easily giving no satisfaction to the overall game. Furthermore, a PvE server won't be all that much fun. It'll be nice to grind commendations/achievements or experience the tall tales, but as time goes on people will simply use the PvE to figure out how to play and become better players then spend their time in adventure and actually enjoy the game. Overall, PvE would be a transition from new to experienced player, not only increasing the number of active players, but creating a more engaging experience from a PvP standpoint. As a side note, with the PvE server as an option, it could give way to more ships per normal adventure server as it will be expected to be more about player interaction (just an idea).
Now I'd like to explain why I think progression should be permitted in PvE. From what I've heard, people are afraid that if progression was allowed in PvE, there would be no point to play the original adventure mode. This isn't true, there can be a lot of progress that can't be done outside of adventure or arena, furthermore you can boost the gold and rep gained in adventure as an incentive if it actually becomes a concern. Also, grinding gold and rep isn't really the best part of sea of thieves. Most players I come across don't even care for taking treasure they just want to fight. Allowing progress in PvE essentially serves two purposes. New players in PvE can make progress allowing them to stay engaged in the game. The other is, the niche set of players who love sea of thieves for its diverse progression can enjoy the game. Both cases are to keep players playing, the game is growing but new players aren't staying, the adventure game mode we know today is slowly becoming two types of players: griefers or die hard SoT fans. Neither of which provides a fun experience to the average player.
Hopefully by this point I have you at least thinking about the wonders PvE servers can do for SoT as a whole. I've looked for good reasons against PvE servers and I haven't seen any that really hold up. Please let me know if you have any, I would love to consider them. I've given this topic a lot of thought and certainly hope rare can change their mind. I would love for more people to fully experience this amazing game.