Although your example shows of how multithreading may benefit you, you need to realize that *very* few people use it for that sort of thing. Yes, there may be similarly complex things that people use it for, but again, that's not what the majority people are using mIRC for. It's going to be much more beneficial to the majority of users if Khaled adds other features than if he adds multithreading that will only really help less than 1% of users (probably closer to 0.1%).
As mentioned, DLLs are there for this sort of thing. If you can learn mIRC scripting, you can learn C++ as well. It may take a little longer, but you *can* do it if you really want to.
