Android 5.0 does. It's actually quite hidden and I only found out about it by mistake when playing with my new update (although I remembered Google announced it

Android 5.0 does. It's actually quite hidden and I only found out about it by mistake when playing with my new update (although I remembered Google announced it earlier after that, but had forgotten about it). More operating systems should be doing this, including desktop ones. Windows makes multiple accounts too obvious.