You'll inevitably hit a rock with your JJs, resulting in a edge pullout/delam/general ski implosion so you'll be left with only your hellbents to ski in powder.
Maybe i'm biased, but I know 7 people in Crested Butte who had JJs and before the end of the season, 6 of them had some pretty catastrophic ski damage. The one who didn't only skied them about 5 days during the season.
like on my 5th day of skiing on the JJs, i hit a rock REALLLLLY bad. Huge core shot that I had repaired literally 30 minutes after it happened, it was so bad that i had to ski down Keystone with one ski in my arms and one on my feet.
but it still feels like its 100% anyway so its all good.
All i'm saying is that they ski great, but aren't as durable as hellbents. Skied my hellbents pretty hard, hit quite a bit of stuff, but came out at the end of the season without much damage.
To be honest, get a shorter version hellbent, and they would be great everywhere. I know a few people who after skiing them, swear that full reverse camber is the way to go and ski them everywhere from knee deep blower to ice hard moguls.