Comment (by Roland Haas):

I see, that would require extra logic even if MoL was being ore accommodating about evolving arrays since you will have to query Carpet about the finest refinement level a given location is contained in anyway. GLOBAL routines are called every timestep (same frequency as eg routines will execute on the finest timestep). Anyway, I was just curious.

--
Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2534/evolution-of-grid-arrays-with-mol-no