What’s the benefit of elf trance as a game feature besides the elf always being second watch?

@newbiedm it never states or calls for elves having to rest for 8 hours. Can you clarify a bit? rest for 8, but only spend 4 in trance

— Mike Mearls (@mikemearls) September 11, 2014

@OregonPinkRose @newbiedmso, what’s the benefit of trance as a game feature besides the elf always being second watch? that;s basically it

— Mike Mearls (@mikemearls) September 11, 2014