That's certainly one rosy way to describe it. Another more realistic explanation one is that it's just an awful language to work in and people aren't writing new software in it.

I'm speaking as someone who had the misfortune of maintaining one of those 15 year old legacy Perl systems.

After finally rewriting the Perl based systems in Go, our outages went to nearly zero, and we could handle multiple times more traffic.

Engineer on-boarding was also easier because they could understand what was going on by just being able to read the code. A novel concept, I know.. /s But that was impossible to do with the Perl based services.