@weekinfediverse@mitra.social@oliphant@oliphant.social's Posty is funny... because it references the phrase “readable by any compliant software” that is in Mastodon's UI, but it's a completely tongue-in-cheek statement because there are probably zero softwares capable of doing anything meaningful with the exported data.
(Well, one now, Posty, heh.)
So it's a rewording of "PRs welcome"... or "we are meeting you halfway, you have to do the other half".
Perhaps there's no ill intent behind it, but I find it just a bit pretentious to say it's in a common format when there realistically weren't any for a good long while.
It's like me saying NodeBB plugins are "compatible with any compliant software", knowing full well they're only really compatible with NodeBB.
I can't even be mad, though. Mastodon said "if you build it they will come", and then someone came and built something that consumed that exported data. So, it worked.
and... "if you build it they will come" has been NodeBB's MO for the better part of a decade, so I guess I'm even being a little hypocritical here.