Perl is its own thing, definitely, and it does a lot of things extremely well (though not always extremely fast) using code that is as succinct as you want it to be, sometimes to a fault.
It is worth learning because of its utility and because of what it can teach, even though you probably won't use it a lot.
Perl 5 documentation still stands out to me as a perfect example of how official language documentation should be. Lots of examples, lots of explanation, standard library and third party modules are named extremely sanely, and it's all just documented so well. Even joke Perl5 modules are documented extremely well; it's just part of the culture that other languages seriously need to adopt.
What was Perl 6 will, moving forward, be known as "Raku".