Game Mechanics Bound Gamemode

Basically, gamemode that applies curse of binding and vanishing to every peice of Armour you put on except quest items.

This would go well with existing gamemodes, hardcore would mean you would never be able to take off gear, Ironman would need to properly find each piece or play naked, Craftsman would require you to craft low level items with endgame in mind, and it would make Hunted significantly more difficult as you'd lose your stuff if you died.

 

I think this is something you can do without an entirely new gamemode added.
Like I don't think they should add a new gamemode fr every weird challenge ever conceived.