As Linus said ARM will only be widely adopted if there is availability of affordable hardware that developers can actually buy. Apple has pulled this off about

As Linus said ARM will only be widely adopted if there is availability of affordable hardware that developers can actually buy. Apple has pulled this off about 4 times because of their small market share and willingness to deprecate old hardware, software and the close control of the hardware they release.| In the PC world - x86 will remain with us for a LONG time to come.