While I'm not too keen on hardcore feature divergences, most of the new features have been really nice things to have, and which are never imposed. (E.g. the walrus operator, type hints, dataclasses, etc). I don't see the need to be so outright hostile to changes, unless they were clearly breaking features.
I'm not sure about that part. Even if one personally ignores something new, someone else within the same project or a dependency will employ the new shiny, and invent one or a couple more ways of doing the same thing in a different way.
That means if it's in the language, you'll have to account for it. Not saying Python is, but given enough new features a language may become a kitchen sink of ideas over time.
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(At the risk of contradicting myself a bit here, I actually agree with the features you mentioned here are all nice to have, and I like using them. IDK if nice to have is a high enough barrier to clear though.)