The barrel jacks have been reported to fail but it's not like it happens all the time.
Right. The occasional failing barrel jack is not a "G&L" issue. Like all their hardware components, G&L used a quality jack. They don't skimp on materials.
But even high quality barrel jacks have a history of failure. Not the greatest design, evidently. I've had them fail on a few basses, but never a G&L (not yet, anyway).
I think G&L has abandoned the barrel jacks altogether recently. My new MJ-4 has a football-plate jack. It's a nice robust unit, I'll be very surprised if it ever fails.

