Learning Vim early on had a high return on investment for this reason. Years later, I'm still able to benefit from the same muscle memory in modern tools, e.g. Obsidian.

It should be said, though, that most implementations are simplified rewrites of Vim's core functionality. When you use a tool to achieve a sense of "flow", it can be grating for the editor to behave in subtly different ways from expectation, or discover an important feature does not work at all. Also, there tends to be limited, if any, support for Vim plugins.

In the modern era of Vim and NeoVim, it's possible for such tools to use the real version via network protocol, but integration is easier said than done. So far it's mostly been Vim GUI wrappers that leverage the capability rather than independent editors.

I still use Vim mode where I can even if it's a shadow of the real Vim experience. It makes life easier to use the same muscle memory on every shell, editor, and command-line, and not have to worry about learning every new app's idiosyncracies.