Floor the adaptive walk stops at on a phone or tablet. The desktop floor of
0.5 is a 1/4-pixel-density image on a DPR-1 panel; on a DPR-3 phone the same
absolute 0.5 is 1/6 of the panel's linear resolution and reads as smeared.
Three quarters of CSS resolution is the lowest a 6-inch screen held at arm's
length stays legible at.
Floor the adaptive walk stops at on a phone or tablet. The desktop floor of 0.5 is a 1/4-pixel-density image on a DPR-1 panel; on a DPR-3 phone the same absolute 0.5 is 1/6 of the panel's linear resolution and reads as smeared. Three quarters of CSS resolution is the lowest a 6-inch screen held at arm's length stays legible at.