Sebring with all that unique 2D stuff and with rich texturing would be much more demanding I suppose. All PBR tracks so far seemed to clean them up quite a bit. This wouldn't fit Sebring at all.
short answer: when they get to it. Next in line is lime rock: https://www.studio-397.com/2021/03/roadmap-update-march-2021/
@Delzimar I sure hope the saem as well. I have been rather pessimistic about many other things lately as well, I'll better be wrong more than less about all of those. Sebring is fantastic racetrack, LOVE THE BUMPS ! I also like Florida a lot.