@ami_angelwings Exactly! There is so much they could have done with that. But noooooo

@ami_angelwings easy for me: the trope of "the clone must die" and variations thereof.

I get so sick of the noble sacrifice to save the original or treating clones with identical memories (up to that point) as monsters or so on and so forth. (This is for clones or doppelgangers that aren't written as deliberately evil, which is a different can of worms entirely.)

And a further subtrope where the clone lives, on or off screen (usually off in older shows to save money on compositing) but they keep them as a bottle episode death just in case they need them for that. Older example: Thomas Riker brought back to be a Maquis agent for one episode. Recent example. Killing off Frost on The Flash after her coexisting perfectly with Caitlyn for like three seasons.

Anyway