To be fair Dolphin’s defaults are insane, they seemed to have approached it as ‘how can we allow file/folder navigation but hide as much information as possible’. If you’re a minimalist you might like it, if you want to use a file manager to manage files I can’t really see how the defaults are useful.
Fwiw, CPUs/GPUs use 128bit wide buses (eg 4060, I think) and wider. So you’re kinda there already.
64-bit here refers to the size of the general purpose registers; but wider (larger) registers are common too in chips that are still referred to as x86_64.