My honest opinion is that some of my skills are atrophying, and some of them are increasing.
I have managed a python app for a long time due to it being part of a much larger set of services I manage. I've never been particularly comfortable with it.
I am easily learning, and understanding the python much much better.
I think I'm atrophying in a lot of syntax, and typing automatic things.
It doesn't really feel straight forward that it's one or the other.