Well, in theory anyone can avoid bugs. It's just really costly and requires a very structured approach to doing anything.

It's very unlikely, however, that you figure out every single combination of variables while writing tests. So, so in practice, I don't think it's possible to avoid bugs, unless you have a really tiny code base, maybe.

That's actually very interesting IMO! Now that you said that, it seems obvious to me that there's a sweet spot somewhere, and that it's higher than 1 and (probably much) lower than 100.

Days of yore when Bill Joy would rewrite / update Unix and userland over the weekend.

https://invidio.us/watch?v=08PmIv1l5LY

surely this solo developer will avoid bugs regarding "communication misunderstanding" between the team elements.