But what about the extra RAM used by 64-bit apps?
Why would they suddenly use extra ram ? Stock apps like calculator is hardly likely to make much of a difference, same with dialer, contacts, clock, messenger, or any other stock google apps. 3rd Party Apps much of a muchness too.
I don't see implication that a 64bit OS would need more memory than a 32bit OS ... Yes in theory it can access more memory - but 'accessing' and 'needing' are two very different things.