I've been playing Wurm for years.
After Wurm Online shafted Unlimited and sold to a different company I decided to only play Unlimited.
Unlimited will no longer receive official updates and is up to server owners and modders to work together for new content.
With that said, with each individual server is a completely different experience.
Faster or slower speeds or xp gains. Extra mobs, less restrictions, more restrictions, more in game buildables, etc.
I've played this game into the ground on too many servers to count.
I've owned my own server, helped on lots of other servers, helped people set their servers up, taught them how to gm, etc.
I can say this.
Wurm Unlimited will always have it's bugs. It will always lack in graphics, you will always have to drive yourself a bit further and find something to distract yourself from your boredom and you'll more than likely find burnout here.
But I think I'll always play Wurm Unlimited.
The social aspect, the creative driven deeds, looting fallen settlements, fighting "uniques", or just sitting in the program "Deed Planner" for hours on end setting up my next deed build.
Wurm Unlimited is my home.
I think a lot of people like myself flock to this type of game to escape their life and do what they're incapable of doing.
People who struggle with PTSD, depression, anxiety, lonliness, etc. You tend to find lots of like people in this game.
People quickly feel like neighbors and neighbors quickly feel like family : )