Foam in not durable not even epo but to me it's equally annoying to pick up my ESM planes and feel the fuselage compress in areas not supported by wood.
Personally I don't have the time to build anymore but I do prefer wood ARFs to foam and I prefer foam to ESM or the old CMP fiberglass.
As far as the original op I don't see wood or glass going away in fact with Sig avid JB models I see more and new all the time