This sounds like a nightmare if you’re dealing with even single-digit numbers of projects - even just in my personal spare-time hobby projects, I have ~5 nodejs

This sounds like a nightmare if you’re dealing with even single-digit numbers of projects - even just in my personal spare-time hobby projects, I have ~5 nodejs projects, ~5 php projects, ~5 rust projects, ~5 python projects - and I find myself wishing for a common build tool because right now, even if I only have one build system _per language_, that still means that eg migrating from travis to github actions meant that I needed to rewrite four separate build/test/deploy workflows...