Got an oil change and inspection at c. 54K miles: all looks good, c. 8mm brakes, 7mm tread in front, 5mm tread in back. (Lol, the first brake pad measurement was 9-10mm, which, if true, would be adding material as I go

: they were more careful the second measurement when I brought that up, hah.)
I've increased the miles between oil changes, from 4K to 6K, since Kia went all synthetic (Mobil all synthetic), and so, if everything behaves, I won't see them again until I turn 60K miles: which is my next maintenance schedule milestone (aka "an expensive one").
By the way, Kia changed their oil change plan: used to be three oil changes for c. $90, iirc; now it's two oil changes for $120; the synthetic bumped the cost. If you don't get the plan, each oil change is c. $90 now.