Agree with Grank.
I am also a huge Warband OG and say that Bannerlord is still better than Warband in its current state.
Without the mods, Warband would be fun for one playthrough but then become absolutely boring. Same few ways to grind your way up over and over again.
I also think that Warband was a huge success, because the game itself was unique with the combat system. I think most people remember Warband to be such a great game, because there was no similar game that offered huge battles with a proper medieval combat system. You can enjoy these battles forever, but let's be honest, it was really boring from an RPG perspective.
Bannerlord is way more complex and colorful in every aspect compared to Warband. Both in combat and RPG elements. Sure, development takes more than a decade, pace is slow, bugs are unlimited - but what can we do? Wait and remain an OG.
(However, multiplayer is absolutely ruined compared to Warband)