Does It Scale (Down)?

This is very sensible but I think is missing one key insight. Very often side projects are ridiculous things that serve very little actual utility but we build them because we think it’s cool. If, for example, I want to writing a reminders app for my groceries that uses a cluster of 8 machines because it’s silly and I want it, that’s what I’m gonna do.

But if you’re building your side project just to serve a purpose and you’re trying to be as efficient as possible then yes, absolutely this advice is incredibly important.

not entirely related, but at the bottom:

"Now that you’re here: Bugsink is a self-hosted, open-source alternative to services like Sentry. It’s built to be easy to use and easy to self-host."

That tells me absolutely nothing about what bugsink is. I'd have to google a different product to figure out what this product actually is. Describe your project on its own terms, otherwise anyone who hasn't used your competitor already, will probably overlook you based on this description.