Mechanical Keyboard Autism Thread - Because Cherry MX switches get you laid.

Affluent Reptilian
What kinda durability have people found with PBT keycaps? I've had these Vortex caps for a bit under a year and while they're not 'shiny', the gritty finish has definitely come off. How long until they become slick and I need to buy some more, and are there any particularly durable variants?