I wonder about the meaning of this: probably there are no unique strengths in Perl that are not present in other laguages. Perl has for sure the richiest regex system but almost all other languas have something working.

Perl makes a big effort to support unicode but is, iirc, not the best laguage in this respect.

Perl lets you to program in a OO style but does not force you to do so. Perl allows parallelism...

I've already said: I'm not the best monk to do comparison between programming languages. Infact I took Perl many years ago and never felt the necessity to use something else: perl let me the possibility to do almost everything I imagine (and I have a big imagination) and do it the way I like. Probably this is the best thing I perceive about the language: freedom.

Maybe this freedom born with perl itself in a gold age, before computer science was fagocitated by new economy. See this interesting post

L*