Actually, many of the newer molded-sole boots can be resoled. I had a pair resoled at Rocky Mountain Resole some years ago and apparently they still do it. Here's an interesting article that lists a few places that do it:

https://www.mensjournal.com/gear/how-to-resole-hiking-boots-20150114/

I'm not sure about the cost-effectiveness. Mine was a warranty issue, and paid for by Black Diamond, who was (then, maybe still) the distributor of Scarpa boots. They were quite generous, BTW. I felt that the heels had worn out prematurely, and they could easily have declared it "normal wear and tear."

Interesting about your plantar fasciitis. I had it too, and that's what led me to get rid of the Superfeet. I guess everybody's feet really are different!