Not entirely, but sure, some great third party project could exist that would help people more familiar with TCL. However, where is the demand? If there's only a couple of people interested then knowledgeable people aren't going to bother putting the effort in - which is fair enough.
When I said it had been requested before, I wasn't purely referring to TCL but the introduction of other programming language support in mIRC in general. Some other clients support Python/Perl/Jscript etc. but I don't think mIRC ever will. That's just my opinion though, I don't think Khaled has ever given his opinion about this issue.
Regards,
