They want to have the cake and eat it too with same instruction set fitting "small" (few hundred kB of flash/RAM at most) and "big" (Linux kernel running device

They want to have the cake and eat it too with same instruction set fitting "small" (few hundred kB of flash/RAM at most) and "big" (Linux kernel running devices and up) ones. IMO it's futile effort that unnecesarily taxes the big codes.