I personally noted that I'm starting to use some LLM idioms "it's not just .. it's .." and I don't like it. I'm actually trying to stop using computers and read books to replenish my mind with more diverse idioms.
but the ship has sailed :)
there is no hiding from it
of course the content we consume modifies us, but now everybody "reads" the same book, whatever they read.
funny trick. similarly when I use LLMs I try to make them emulate people's writing patterns from previous eras.