Point 2 is False. It's easily possible to write code compatible with both 2 and 3. It's becoming less pleasant as one can't take advantage of the great new feat

Point 2 is False. It's easily possible to write code compatible with both 2 and 3. It's becoming less pleasant as one can't take advantage of the great new features from v3.6+, but I've done that for about a decade now. I agree somewhat with Point 1, but the Python ecosystem is larger than Ruby's. Each domain could have moved separately, and did, to some extent.