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.

I wasn't too averse to using the construction until I saw the latest Eddy Burback video where he had an AI encouraging the delusions he was faking for the sake of the video. The sheer number of times the AI said "it's not just X, it's Y" absolutely broke any willingness I had to ever say anything like that again.