Brian Conrad and Ofer Gabber have some results that were announced 9 years ago here:
https://www.ihes.fr/~abbes/Gabber/OferGabber.pdf
and there's a talk by Gabber about them here:
https://www.youtube.com/watch?v=QO6ooWdsBN8
But I haven't been able to track down any written reference for them. Does anyone know if such a thing exists?