I think this metric is grossly overestimated. Or your scope for "out there" is considering some smaller subset of python code than what I'm imagining.
I think the evolution of the language is a great thing and I like the idea of the type hints too. But I don't think most folks capitalize on this yet.
Of course, in a world of Python 2.7 still being a large code base and Python being used a lot for scripting, this will far from the truth for the entire ecosystem.
There is a bit of learning curve (because, well, it's not shell which is what most people are used to), and you do have to please the compiler before being able to run your script, but OTOH, you'll basically never have that "oops, I just deleted my working directory because I used a bad $VARIABLE" experience.
It's all about the culture. And Python culture has been protecting us from abuses for 20 years, while allowing to have cool toys.
Besides, in that release (and even the previous one), appart from the walrus operator that I predict will be used with moderation, I don't see any alien looking stuff. This kind of evolution speed is quite conservative IMO.
Whatever you do, there there always will be people complaining I guess. After all, I also hear all the time that Python doesn't change fast enough, or lack some black magic from functional languages.