Only (what?) another 15 years to wait until Mark hits his half-century in the music business. Then, perhaps, you can assess his performance on the same basis.
And, if you guys value Mark so highly, then why do you doubt his judgement in putting on hold the recording of his own album in order to be the support act for a pre-planned and arranged European tour by Bob Dylan? There must be a reason for Mark's decision and it's certainly not financial. That's not to say that he didn't get paid (and probably handsomely) but he certainly didn't have to do it for the money (nor did Dylan, for that matter).
There are a lot of Dylan fans who found Mark's set "boring" (that's an adjective commonly applied and they're wrong, too) but I certainly did not doubt Bob's judgment in adding Mark and his colleagues to the bill.
I found it a great double bill. Two performers, with different approaches to their art and their task in life, both valid approaches, offering a great evening's entertainment. I didn't like every single element of either's set over the four nights I saw them but I wouldn't put them down for that.
If they repeat this double header in the future (and I certainly hope they will), then I'll be very pleased if I can arrange to attend some of those shows. If it happens, it won't be in Europe, in my opinion, so I have already decided to start putting money aside for a trip to who knows where?. North America I guess.