Yes, but most numbers I've seen on nozzle size / kerf size are too big by a factor of 2. In the worst-ish case for a cutting process that cuts a pill shape (rectangle with semicircle ends from a translating circular cut) by plunging in from the edge, my total tooth height is 0.3mm so if I aim for 0.1mm of flat, then that leaves 0.2mm of radius == 0.4mm kerf. Most typical numbers I've seen are more like 0.9mm and the Wazer for example is 1.2mm.

Maybe worth another look though to see if there are more specialized machines. The thickness & total amount of material I'm removing is nothing so maybe there's something out there

Pinhole breaks in hydraulic systems have seriously injured/killed workers, so I believe that a water jet could be made small enough… but whether that’s practical is another matter entirely. The passage of abrading grit might wreck the nozzle in short order.

>The thickness & total amount of material I'm removing is nothing

PCB end mill? McMaster-Carr has end mills as small as 0.002" (50.8 μm) in diameter

https://www.mcmaster.com/micro-end-mills/