I'm awae but running multiple instances isn't really something I want to do. Can it be launched with a single click? Maybe if you wanna write a batch file or something. Manageable with a GUI? Maybe if you code something yourself.
Then each instance takes up how much taskbar space? Extra RAM? Desktop space for shortcuts/etc?
No I understood fully, I just wasn't interested in doing that myself. I agree though that it's a work around until mIRC gets redesigned.
Another good idea, based on current features available in mIRC, is to fully save sessions and reload them when restarted. For example, restore every server, with nicks used, channels text reloaded (like log files), rejoin all channels, etc. So then everything can be dynamic rather than adding channel names to scripts and such.