In my experience, it frequently doesn't work within posted hours either
cries in SSI

Appreciate the sources!

I don't always test my code, but when I do, I do it in prod

Klanned Karenhood

Does it only log usernames, or does it record ip addresses as well? I am much more okay with one than the other.

It seems these multi-posts are typically coming from a user getting an error message when their post actually goes through, then they try posting again.

After I learned about that I've been bookmarking comments I want to reply to, copy my intended post in another document, then check later to see if what I wrote was actually posted. If yes, yay, don't have to worry about multiposting. If no, I just post once the server isn't being weird.

Is this truly viable when anyone can spin up their own Lemmy instance?

You know, I came in here with the mindset that the topic of discussion here isn't a bad thing; I'm largely pro information-should-be-open-and-available. But you've argued a very solid point, and I've changed my mind on the issue. I appreciate you sharing this perspective!