Certainly in my experience the more you are in a TTRpg the more combat orientated and reckless you become. This often made worse by players becoming bored in larger parties, especially if you are a fighter.

Tighter smaller parties and a considerate DM will usually have more dynamic games. But I still really want 5 or 6 for BG3!!!

Also I love larger parties in general, even on board games, but it is hard to balance a board game at larger numbers and that is often were the 4 player design aspect comes (I.e board games vs others). Like I said, ry getting more than 4 round a table on a regular basis!