More importantly though,

By the time 7.x is stable and released, users will quickly begin upgrading. This includes your users that still don't use unicode (the users of which you still haven't tried to inform to use Unicode on 6.35, it seems). My assumption is most users not using Unicode in this day and age are mIRC users, since most other clients are Unicode only to begin with. Well, when 7.x is out, they'll be able to upgrade and start using Unicode-- a critical mass won't take long to reach before people stop using codepages by either upgrading or at least enabling Unicode on 6.35.

So why would Khaled re-implement codepage support on 7.x after people will upgrade and use codepages less? If Khaled's goal is to get people to stop using codepages, adding the support back later completely defeats the purpose of that goal.