Um... ARM got assembly "right" three or four separate times at last count (depends if you count thumb and thumb2 as distinct architectures). And I believe they now have three equally "right" (and mutually incompatible) floating point architectures.
Everything has warts (and x86 more than most). But don't pretend that ARM is clean. Or VAX (integer polynomial instructions? Non-IEEE floating point what now?). Or MIPS (A branch delay what? Multiply outputs to a separate register?). Or even 68k (let me puke garbage on your stack, I'll just tell you how much room you need).
Everything has warts (and x86 more than most). But don't pretend that ARM is clean. Or VAX (integer polynomial instructions? Non-IEEE floating point what now?). Or MIPS (A branch delay what? Multiply outputs to a separate register?). Or even 68k (let me puke garbage on your stack, I'll just tell you how much room you need).