Python removing "bad" old ideas caused it to stagnate on 2.7 for a decade and probably did irreversible harm to the ecosystem as people left for languages that

Python removing "bad" old ideas caused it to stagnate on 2.7 for a decade and probably did irreversible harm to the ecosystem as people left for languages that didn't have a nasty split in the community. C++ has evolved tremendously so I have no idea what you're talking about there. Removing "goto" would help nothing, and the more or less deprecated features keep old codebases alive while allowing for better things (shared pointers and so on)