I would have done the same thing, getting into to Rust, etc. after the job transition, as you have other things to focus on. However, you mentioned Rails, and I think this is an opportunity to talk about "leaving the garden".
I have a few projects I had enjoyed working on, but when I left the old job, I was stuck with those projects and no one wanted to take them on- I tried to find help, but it was temporary- no one has taken over. Do you or others have suggestions for successfully abandoning a project, because I can't seem to, and those projects languish with the lack of effort I put into them because it is so infrequent, but I do just enough apparently to keep others from thinking I've abandoned them.