I didn't make heavy use of it, but I did sometimes use "It's not X, it's Y" or some closely related variant. I've had to strike that from my writing, because whether or not it makes anyone else cringe, it's making me cringe now. My usage doesn't even match the ones the LLMs favor, my X & Y were typically full clauses with many words rather than the LLM's use of short, punchy X & Ys... but still. Close enough. Can't write it anymore.

I'm still using bullet lists sometimes, as they have their place, and I'm hoping LLMs don't totally nuke them.