At 47 i have to assume you don't want to be hoping from airline to airline. It's a personal call really. Do you live in base? Do you need the money? Do you need to be a capt? Are you miserable where you work? I'm sure you've run the numbers. If you go to jb class today you'll be 50-60% in 5-6 yrs. Currently i think capt at Blue sitat 70% ish.
I can't speak for aay other than what i read here and a buddy who doesn't care for it.
I'm sure there's some guys who have done what you're thinking.
Whatever you do, good luck my man