Joke or not... there's actually a lot of sound logic...

I mean, I never thought about the limits to things like the speed of light could be set because of the limits of the OS running our simulation... and the easiest solution to the fermi paradox -- is the one where we're the only thing because we're all the simulation allowed for.

So, while it may have been a joke, it definitely provides some thoughts to back up, but I wouldn't say it's "confirmed"....

Confirmed would be a message printed on a proton smashed by the LHC saying, "you're in the matrix".

Confirmed would also be peer-reviewed and on every news station on earth (well, not fox or oann).

I don't see it as an April fools joke. It's more like a half satirical editorial piece with a clickbaity title. And the last paragraph sums up that it's not meant seriously.

That's what a simulation would want you to believe!

So posting clickbait is now an April Fool's joke.