"jesus christ, lots of people using something *does not* imply that they're doing something right. Fuck's sake."
PHP can run on pretty much any cheap hosting service. So that's one of the things they did right. But the way they did it has advantages and disadvantages. Tradeoffs, as always.
Your (apparent) fave C has evolutionary advantages and tradeoffs, too.
Fosstodon is a Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.