desktop ecosystems

bios uefi

windows

legacy co-resident kernal security filesystem time-machine

driver quality

Move to arm - whole stack - os/dev-tools/hardware/iStore(distibution) power management driver quality

powerpc/intel split

Apple to Pull 'iDOS 2' DOS Emulator From App Store
- Your app's can't execute code. Apple controls what your software can do. Thank goodness for open platforms.

distributions (core kernal)

support(and proritory) e.g. cannocical

open lag-behind support (music software/drivers chiken/egg/demmand) server space not desktop space

dalvic vm

ios swift

gfx + processor shared memory space + known gfx hardware