To be compliant with windows it should ideally save settings in a mIRC\<script name subfolder>\ folder in the application data folder.
Exactly, and that's just where my $mircdir points to. And as of the next version of mIRC it'll be the place everyone else's will point to aswell unless they explicitly specify otherwise.
By contrast it could entirely be possible that an administrator on a system would install mIRC scripts to a subdirectory of the mIRC installation folder which may or may not be writeable by any other user, making $scriptdir a risky proposition.
