As someone who used Python for more than a decade, a few months ago when I saw PEP 572 and that Guido liked it I knew that it would be by far the most controversial one ever.
And I was very concerned that there was no outside community involvement. This is one where there should have been a lot of publicity around, and the community should have been asked (on r/python, r/programming, HN, ...)
It's sad to see this, but it's not surprising to me. In general the Python community at large accepted Guido's decisions, but this one was too much of a shock, and when the python-dev discussions where so heated, you can only imagine the response from outside.
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