Not just complicated, but even simple ones if the current software is too “new” of a pattern they’ve never seen before or trained on.

I dunno if Rust async or native platform API's which have existed for years count as new patterns, but if you throw even a small wrench in the works they really struggle. But that's expected really when you look at what the technology is - it's kind of insane we've even gotten to this point with what amounts to fancy autocomplete.