In my campaign recently I just unlocked a flying ability so I fly to the second floor and look for windows and the DM says "no there are none". I'm like bullshit. What building doesn't have windows?
Sounds railroady and yeah BS, but I know some that don´t have buildings. Like a Dungeon, a Turret with just arrow slits same with the Burgfried. Or a Barn, maybe a church that abhorres the Light and or Sun? Just spitballing :)
Exactly, when there are Wizards with flying, and Druids that can turn into birds or bats, how would architecture look like to prevent especially that usecase?