How many mainstream Linux apps are proprietary and not compiled for ARM?
Just from the top of my head:
But how many remain in wide use? I don't know what decade you're posting from, but the majority of apps you listed were superseded years ago.
Netscape Navigator and Netscape Communicator
Discontinued in favor of SeaMonkey.
Discontinued in favor of LibreOffice.
I thought most GNU/Linux users were on IcedTea now instead of using Oracle binaries.