Currently, expansion is occurring on the small scales, but it's well-below the sub-atomic scale so isn't noticeable or relevant. But the expansion is unrelenting, and space is stretching, so over trillions of years the expansion, even on the smallest scales, will be relevant.Eek, I should've seen that.
So is it mainstream that over 4.5 billion years that planets have moved outward from the Sun due to expansion? Or do they simply keep their orbiting distance ignoring the infinitesimal daily expansion? It's interesting to me to favor the latter view in a Newtonian universe, but the former view may be favored where the planet is seen to simply travel along an expanding geodesic. But the spacetime gradient, I assume, will remain the same and the planet will, seemingly, just ignore expansion and stay in that region since the gradient isn't expanding to allow a more distant geodesic. Is there a favored mainstream view?
Given a continued acceleration rate for expansion, of course at some very distant time, the daily expansion rate will overpower all the rest. But that seems to me to be a different circumstance than today, or is it all the same just far less noticeable now?
Take a sheet of rubber and, with help, pull on all sides equally. Observe the center: There is little stretching there, with most of the stretching happening on the edges. But as you continue to pull the sheet, eventually even the stretching at the center becomes visible.