"It's not X, it's Y" is still the most obvious one. Abuse of passive voice is another. We stopped talking about it because it gets boring to say the same things over and over.

This has not been my experience. People talk about LLM-isms (Claude-isms especially) all the time. "The absolute shape", "load bearing", "seams", "smoking gun", genuinely empty preambles, constant sloganesque phrasing. If you're seeing it less in conversation, it's not because it's improved.