It’s a little bit of a peeve of mine that people just decided on new languages instead. But it is what it is, and I am probably not knowledgeable enough to really judge.
The trouble is, if every new version is _technically_ its own new language, and if you have to break compatibility a little, why not just break a lot and fix everything?
It's not like C++ was ever known for ABI stability anyway.
There is a lot of old code that will never be rewritten but is still valuable, and I believe we will waste a lot of time just language-shifting entire ecosystems as new languages come and go.
Look at python 2 to 3. There are still packages out there on python 2 that haven’t been migrated. And thats mostly the same language!
(Note that my view is colored somewhat because I am a scientific programmer)