I am 47 years old and I have owned many different tube amps including the heaviest twin reverbs and marshals in the past.
I have owned a POD X3, Pod HD 300 and most recently I have picked up and HD 500x.
I have many reasons to use an amp modeller but one of the is the most important reason.
WEIGHT!!!!!
Modelers are easier for me because I do not want to cary an amp.
Very few jazz musicians can afford a roady.
This guy makes light weight cabs http://www.flitecabs.com/guitar/
But they are not powered. He makes them from graphite I think.
But amps with digital power supplies should only add a few pounds to the WEIGHT.
If Line6 could make an FRFR amp that has L6-link connection, and that weighs around 20-22 pounds, I would buy it in a heart beat. I think a lot of people would do the same if we could see a graphite made Amplifi that has 200Watts power and that weighs around 20 lbs.
I do not see the point in carrying a 45lbs amp if I am using a modeler.
So, DTs do not make sense to me.
I can always carry my HD500x w/o an amp and use the P.A which is what I do mostly but a light-weight powered amp would be perfect for a small venue.
And Line 6 why not spend a little more time on your clean tones.
Apple Logic's clean tones ( both fenders and Voxs ( are much better sounding )
Not all your customers use heavily driven sounds.
I use mostly clean tones except occasionally some light overdrive tones.