[aGHz]

> I haven't worked on any teams. I've always written software solo. What of it?

Well, that means you have zero experience with the majority of concerns expressed in this thread, and so are not qualified to opine on them. You work in a happy bubble and I envy you for it, but in the real world you very very rarely get the go-ahead to refactor old code. So in the real world, you very very rarely get to see a quality code base. In any language, really, but PHP compounds this problem with its idiosyncrasies. But you wouldn't know about that.