I personally prefer airbnb when traveling in big groups so we can actually hang out together a bit better, cook for one another, have a big table to play board games and a space to drink before going out that isn't just sitting on each others beds. If I'm just traveling with my partner then yeah we usually go with a hotel but most of our European mainland holidays are in groups of 8+, so we go airbnb. Usually cheaper per head and a better space than what we'd get at a similar price for a hotel.

This. Better pricing compared to hotels is the whole point.