Hey, I did hesitate about that. I thought, surface=paved is not specific enough and is discouraged by the wiki, surface=flexipave feels like the correct value (unless there's an existing synonym I'm not aware of). But yes, it won't be picked up by parsers until it gains a fair deal of traction, realistically. But then someone's got to start using it.

Dunno. I'm kind of on the fence, slightly favour surface=flexipave, but if you or anyone feels strongly I'm happy for it to be changed.