I would agree, although I will point out that we might also be looking at previous titles with rose-tinted glasses. Companion banter in BG1 was very limited. In Mass Effect it was basically down to a few remarks in cutscenes or elevators. I do not recall much interaction between companions in DA, but there were a few dialogues for sure. *snip*
Dragon Age Origins didn't have much, but DA2 improved upon it and DA Inquisition had quite a lot companion banter and scenes between companions. ME1 and 2 also felt a bit short on that end, but ME3 and ME Andromeda improved upon it once again and there were a lot of banter and banter between our companions. Felt like they were truly alive, because they talked to each other and visited each other.
True, true. I might be forgetting some things. Still it somehow isn't enough to really ever made me feel like it is a natural party, regardless of the game. I would very much rather have real dialogue between the companions than just some remarks that are so easy to miss in the world. Often it is also not very engaging, like when we would make our runs around the Normandy to update everyone's dialogues. I do similar stuff in the camp now.
After all I think BG2 did it best, but it might have been very companion dependent, Aerie just had a ton of interaction, like 3-4 dialogues with Korgan and Minsc alone, a couple with Jaheira. Really gives the party a lot of depth, too. I do not know whether there was much interaction among the others though, I always have a rather set party.