On a Ric, it never goes away. Mine have been glossy since 1979.
Weird -neither of my RIcs are shiny anymore on the fretboard -One is a 1981 and one is 2018 -You Gotta play them more!
That's probably fair. They aren't my #1 players. I tend to use them most for composition. They are very comfortable to just sit on the couch and play for hours. But gigging, they are a bit finicky with weather/temperature and general playability/staying in tune, for me.