Is Perl "less popuplar" than it used to be ... perhaps. So what?
As a counterpoint, if I want to script Poser (a 3D graphics app I own) I have to use Python. If I want to mod Civilization IV then again, Python is required. And even games that do not advertise the ability to mod are using Python, such as the second Freedom Force game. So quite frankly, I think Perl's reputation does matter. The less popular it becomes then apparently the more likely I am going to feel pressured to learn Python.
And I think it goes without saying that there are ramifications for those of us who use it to help make a living. If nothing else, if it is considered "old school" then it could become a liability on a resume. For sysadmins I seriously doubt it has reached that point. On the other hand, I think it's a lot coser with PHP vs. Perl. I mean, I think I'd rather have PHP on my resume today if I was appplying for a web development position. [ Sheds tear. :( ]