I'm the person who wrote the second quote in the OP, and I don't go back and forth anymore...I'm all gig bag, all the time with my solidbodies. I do use the hard case for my HB1, but it's such a great, ergonomic case, it's a lot easier to carry than a standard hard case.
I used the PRS bags for a number of years and recently moved to mono bags. I've got a single and a dual M80. They're great. I'm sure there's some situations I'd use a hard case for, but I'm not in them frequently. At least twice a week I'm loading gear into my car to play or rehearse and the bags have done a stellar job of protecting gear and making transit easier.