Rusty are you not underselling 2 here? Where we can of course get 10 / 20% gains with improvements like taproot and Frost lightning can represent 90-95% efficiency gain over the lifetime of an individuals bitcoin usage.

We still have the limitation of the # of satoshis that exist and the # of UTXOs that can exist, but this pushes against blockspace driving the threshold of subfee UTXOs as well 

 It's hard to get exact numbers, but a significant fraction of the world will not have enough money at one time to spend a single UTXO. This is clear from the uneven distribution of wealth and the inevitable rise in Bitcoin fees.