I’m not a huge fan and I have too many other things growing or that I want to grow. They don’t really have a prayer here in colder years. Like that -18° with strong winds in Feb 23 would wipe even the hardiest one out. One thing I thought about doing is growing an RdB fig in the field with horizontal branches near the ground. Then prune it back in the fall and cover those branches over the winter with dirt or mulch. I could get a strong rootzone going that way and it would explode with growth every spring. Zone pushing can be a lot of extra work.
If there was one thing I’d push and try to protect it’d be cold hardy pomegranates. I’d probably be tempted with lows in the -0s, but our frequent -10s scare me off.