It might be the right decision for people to convert their Perl application to other languages. For example,

• It was the wrong decision in the first place, they picked Perl to develop things that Perl cannot do very well.
• It was the right decision, but no longer is. Some of the features that were once unique in Perl and defined Perl is no longer unique today. For example, Java picked up regexp support. Java's regexp might not be as good as perl's, but one probably still picks Java's regexp, if most of the other parts of the application are in Java, and Java's regexp is more than enough for them.

Will I continue to do things in Perl? I will if it fits. Well I do things in other languages? I will if they fit. The bottom line is to do the right thing with the right tool.