Always funny to me people say 4 is fine for these RPG games that support 4 max....and he first mods that gets made are for a party of 5 or 6.
It's what I jokingly call "imprinting bias" or "Polaroid bias".
These people more often than not will defend anything to protect the status quo and take the side of the developer regardless if it's a thing they actually prefer or not. Often even using puzzling arguments like "It's not going to change anyway so it's fine" (as if the point was making a prediction rather than expressing a properly motivated preference).
In most cases if Larian would come out tomorrow saying "Yeah, we decided that a 4-men party blows unwashed ass because it doesn't give you many chances to interact with more companions" you'd have the same people jumping on the cart and switching their tune to "I'm glad they changed it, I prefer to control a larger party as well".
It's also worth stressing that no high ceiling for party members has EVER stopped anyone who wanted to play with less of them or even solo. Not even in the past Baldu'rs Gate titles, for a start.
