Researching this as well but my main concern is non-skid properties more than super hard, wear forever finish.
But regarding hard finishes, there are products that are sold
for gym floor finishing that advertise wear resistance (but of course we all know how accurate and honest ads are). Also my son in law is a builder
and does a LOT of floor finishing and there are some products he swears by. Will ask him to tell me (again) the brand.
I'm investigating the use of non skid additives. I found an interesting non skid additive that is kind of clear when added to varnish
. Looks similar to microspheres or something one would add to epoxy
for a thickener. My idea would be to add it to the finish coat and paint
it only on the light colored holly (really maple these days) where it wouldn't show but still make good non skid.