As far as I can gather the RF just produces old fashioned heating, which relaxes the lignin in the wood. Furniture manufacturers have RF presses for forming curved chair parts and such.

They also sell a hand held RF gun for gluing that turns PVA into an instant glue. It would be great for stapleless stripping, if you could justify the $3000 price tag.

Anyway, there are wood bending processes that are even more dramatic; how about a kayak sized steam box, a liquid ammonia bath or, my favorite, a hydrazine soak?