I like it.
Gamerule Idea: Eggshell Chess
+1 I think if each piece can be set individually will be better like e pawn 5 moves and f pawn can be 6 moves so it is also have more ideas for variants

+100
Very nice idea, I hope @Chesscom staff really take this idea into consideration especially because it can also work for 2pc.
The idea here is that each piece is an "eggshell" extremely delicate, and to be handled only when absolutely necessary! Each time you move a piece, it forms a "crack," and if it cracks too many times, it's dead.
I think in order for this to make sense, the king (or royal piece) would need to be excluded from the eggshell rule. It also might be a neat add-on to make each piece have a different durability. I.e. pawns are allowed 15 cracks, queens 10, and everything else 8.