Originally Posted by
Troy Tiscareno Someday Windows and MacOS will be replaced by something... but MacOS has been with us for 32 years (in one form or another) and shows no sign of leaving soon, and Windows has been around for 25 years, and also is in no immediate danger of disappearing. So even though it's true that nothing lasts forever, it's just as true that the big OSs tend to evolve and stick around for a LONG time.
iOS and Android are the 2 survivors of the mobile platform wars, and as big as they are and as extensively developed as they are, it isn't going to be easy to displace them.