LuneOS tries to keep webOS alive

The ARM platform has been in a large amount of hardware way before Linux was even ported into it. Cars, computer parts, watches etc have used ARMS since 1985 and the ARM chip was shipping at much larger numbers of CPUs compared to Intel and other manufacturers since the mid to late 1990s.

Linux had nothing to do with that.. The market that ARM is known for now (small units like beaglebone etc) is large because of Linux but in numbers shipped they are immensely tiny compared to overall ARM usage.