I.e., some douchebag who has no interest or stake in what you do has just dumped a potentially substantial amount of technical debt into your product backlog and, quite possibly, prioritised it all the way to the top.

As somebody else noted above: I don't need people creating more work from me. I can do that quite well enough on my own, thanks very much, and for side-projects this kind of chopping and changing is a pain in the ass.

By definition, with side-projects time is limited, so you absolutely have to focus on the most valuable activities to the exclusion of all else. For this reason, I only consider AWS and Azure for my projects: Google are just too fickle. Lucky you, if you have the time to deal with their nonsense.

(Btw, I'm not dissing Google on a technical level - they obviously do great, interesting work, and they're certainly one of the pioneers of PaaS. I just don't need the hassle of having to fix stuff because they keep killing APIs, projects, services.)