I’m sure mods are really important to extending game life, just like multiplayer, even though I’ve managed to clear over a thousand hours playing without touching either yet! I also can’t comment on Skyrim, as I’m a cRPG fan who embarrassingly hasn’t even tried it.
But I will say that the commitment of the cast to their characters and the community is fantastic to see, and speaks really well of the experience they had working with Larian. I’ve only watched the odd panel and TT stream, but they’ve been really engaging.