Though I wish it weren't true, all of the J/30 racing here on Loch Mich is PHRF. We're not even able to get 8 boats for the NOOD these days (though I hope that will change next year).
There are 6.5 active boats here in Chicago, doing probably 15-25 races/season.
I still think however that for me, remaining J/30 one design is more cost effective. Just one opinion however.