One thing I found useful when I was researching skate materials is the napkin test. If you rub a PTFE skate against a pad for a bit and hold it near small paper scraps, it attracts them. That’s triboelectric charging in action, and it’s just something PTFE does because of where it sits on the triboelectric series. POM doesn’t really do that in the same way. I’m not saying that’s the only reason feel changes over time, there are probably other factors too. But when I was deciding what to run on Skyline it felt like an unnecessary variable to keep around, especially for players who are actively trying to build consistent muscle memory.