Talk about overthinking...lighten up people.
I don't think Line 6 claims it to be a replacement for an tube amp head and a full stack!
I'm on my way out to pick one up right now...no kidding.
How about this senario. This amp is perfect for my practice sessions. I can cue up a Guitar Tricks lesson on my laptop, and play the audio on the Amplifi while I play along...no cables, no mess.
Just as a full stack has an intended purpose, this unit has a purpose also, so please stop comparing an apple to an orange!