Uhm well a big reason is also I guess because perl usually is open-source so when a company develops software with a nice and new feature others will simply copy it etc etc...

I think you misunderstand Perl's license. Perl itself is Open Source. The software you create with it doesn't have to be.

But for really big applications tbh I would choose C++ and not perl for lots of reasons. Perl is great for small scripts, webpages and small apps but for really big stuff...hmm I guess C++ for example is just the better choice even if it would be possible with perl.

You seem convinced that C++ is better than Perl for "really big applications" but the fact that you haven't listed a single reason for that belief would tend to weaken your argument.

--
<http://www.dave.org.uk>

"The first rule of Perl club is you do not talk about Perl club."
-- Chip Salzenberg