it needs to change to mbits of something smaller because its a bit of a mess
and new users will struggle to equate value of a payment like 0.0035 to buy a coffee that costs $2.50 in fiat
What fraction of an ounce of gold does the coffee cost? Bitcoin isn't really for day to day transactions. It's a store of value and hopefully a means of global trade. Using mBTC and uBTC with off chain transactions might allow consumer use and even micro payments but those aren't where the really big valuations will come from.