Abandoning the ISA is probably too extreme. MIPS was pretty dead when they abandoned it, ARM is still alive and well. ARM could survive by making the ISA free

Abandoning the ISA is probably too extreme. MIPS was pretty dead when they abandoned it, ARM is still alive and well. ARM could survive by making the ISA free and competing by having the best ARM core designers and designs, and/or by having proprietary addons for media handling/decoding.