As far as I know, every desktop/server distribution of Linux has Perl (and core modules) installed by default, AIX and Solaris (IIRC) also do.
By "by default" I mean that even the most lightweight variant has it.
I haven't worked on BSD or similar ones, do they come with Perl?
Motivation: I'm trying to figure out if encouraging people in my team to use Perl instead of awk/sed/other text utils would make sense.
Note: Which is the most portable of sed, awk, perl and sh? does't answer my question. Portability it's not my main concern here, availability out of the box is. Even if all unix-like systems have awk/sed I would still prefer Perl.
Note: also, by Perl I mean Perl 5.8+