The key to its portability was that it shipped with an interpreter that would run under a simple bytecode machine. Implement that bytecode and you could run Pascal on virtually anything. Back in 1970, this was a pretty useful feature.
Apparently it's been around REALLY long! And it was the official language for SA secondary schools till 2002.
Also sysadmins are unlikely to support platforms in which they cannot assert their dominance.
Also, I wonder if you are being a bit harsh about us being "extremely slow" to adapt to new trends, but that's just personal experience -maybe I've been lucky.
I've worked with vendors and clients from Europe and UK, and we seem to be able to keep up fine with them. I also know SA programmers who are doing fine in Australia. There's a lot of legacy crap that needs looking after, but that's a problem all over the world.