Here (7:32) You can see what I'm talking about - https://youtu.be/zyumuXS1G58?t=452

Maybe an option in the config file?

That's something I have considered doing, but I don't want to prevent people from making a base in a tower. I would 100% add a crumbling animation if I could settle on a way to let people "save" the tower after beating the boss if they wanted to.

Would it be possible to feed a consumable to the tower's boss after spawning him/her to, for example:

• If the tower starts to collapse by default, then feed the boss some precious metal (gold or diamonds or nether stars) to prevent the tower from collapsing upon boss defeat.
• If the tower does not collapse by default (which I would prefer for the above reason), then feed the boss some TNT to force the tower to start collapsing once the boss is defeated.