So what you mean by "stable" is in the names only, but not in substance.

What I mean by stable, is that my code remains working after I upgrade the dependencies, which is definitely NOT the case for python frameworks, but it is mostly the case for Clojure libraries.

In Clojure, Web related things have remained relevant for a long time as well. For example, I do not anticipate that the standard things such as Ring, Reagent, Re-frame, etc. are going to change any time soon.

If you have not used Clojure, you just have not experienced what a stable ecosystem looks like. You have too used to changing your own code just because of a dependency bump. This is very rare in the Clojure world, but a norm outside.