This happens to every developer once we get over like 20yrs experience doing side projects. Invariably the dependencies and technologies of any app become obsol

This happens to every developer once we get over like 20yrs experience doing side projects. Invariably the dependencies and technologies of any app become obsolete over time, and you either do a massive rewrite or else give it up. I've always had one primary side project of my own that's consumed 95% of all my time over the years, and so I've rewritten it from scratch at least 5 times as technologies (libraries, databases, languages, etc) have evolved. Not many people are lucky enough to love one app so much you'll do this, so your other side projects just die off, because they're not worth a rewrite.