I'm sure mIRC will be open source in a future
I'm not sure, and I sincerely hope that this will never be the case. Can you imagine the number of hacked, dangerous/infected executables masquerading as the "original" mIRC that would result from doing this? Or the number of lame scripts pretending to be new clients (which would in turn make a forum like this almost unmanageable)?
It's bad enough already, but going open source would be a catastrophe, if not criminally irresponsible. (Yes I know that "social responsibility" is not in fashion right now, but still...)
Besides which, anyone with the programming skills can write their own IRC client anyway. It's not like mIRC is the *only* Windows chat client...