Im not going to get into a debate about it, either way it doesnt effect me at all, as you have pointed out.
However since mirc has millions of users I think it would be fair to say its possable alot of them wouldnt save settings, as they have never needed to before, and thus find now something that used to work doesnt. So ill say "maybe" it would effect 1000's if not millions, you cant absolutely say it wont.