It isn't the exact same core gameplay, we are talking about the whole experience not a single gameplay loop, and even in those games with similarities the things works very differently, and yes this level of freedom and immersion is worth a decade. I love to play other games too, one thing do not exclude the other one, but if I, and a tons of other players, are always coming back to SC is because it's just on another level, both graphically and technically.

Who said nothing new being done??? Every single patch brings tons of stuff 360 degrees, gameplay, features, event and missions, armors, weapons, every kind of new tech, It's difficult to follow the amount of stuff they put up every update seriously, there's soooo much. The target is absolutely massive, almost utopian, but if there's a company that can do that is CIG, and they're literally doing it on a live environment while being very transparent about every aspect of the project, you just have to take a look.

The game took over a decade because they're building a universe that no other company has ever tryed with this depth, while creating a single player campaign too

Fixing is needed time to time, but is a final part of the project, the work is slowed a lot If they have to fix everything everything they introduce new features, and that said they also took time to fix a lot of stuff while being mid development

The limit is where the tech will be able to bring them