>>Thus Python3 failed (and frequently, continues to fail) to be a compelling upgrade to anyone but unicode purity fetishists

Huh? No new project of any note is using 2. Everyone has either upgraded to 3 or never even learned 2 to begin with.

I am not a "unicode purity fetishists" and python 3 has been a compelling upgrade for me for the past 3 years. I have not written single line of python 2 code since 2 years ago. So your statement that it is not compelling for anyone is wrong. Maybe some people are python 2 fetishists? I have upgraded multiple python 2 codebases to 3 and I am not understanding what people are whining about, it is not rocket science.

This is something people are getting paid to do; maintain their codebase and keep it up-to-date.

Because no one could ever be justified in moving to Python 3 for AsyncIO, f-strings, ordered dictionaries, assignment expressions, pathlib, new features in shutil/tempfile/subprocess/etc, along with massive improvements to memory consumption, runtime performance, and overall stablility?