yeah, increasing precision is starting to loom on the horizon. but i expect that won't become pressing until next cycle at minimum. when you have 10 sats/dollar there starts to become some issues with pricing common small items. i'd also say that millisats mostly push that into the future another 8 years further. it's possible, even, that lightning protocol may actually defer increasing precision by decades. since the deferment of settlement is the whole point of it.