Personally I think they look ugly and although I have never played a Guitar that has them but can’t see that they are comfy to use?
Most of our guitar hero’s used normal frets and it didn’t do them any harm.?

Personally I prefer oiled fretboards to work on and definitely to play on. Most bolt ones gave lacquered and do not play well until a number of hours of use…only my opinion.
A lot more work to built too?