It’s OK to want more, but then don’t bitch about it! Chasing perfection in accuracy is a choice, and modelers don’t do it any better. There is no model that is perfectly accurate and remains perfectly accurate at all knob settings. Even if there was, it would only be perfect for one serial number in one environment at one point in time. More hours on the tubes, a little drift of a resistor etc. and the model is no longer perfect. Who the fuck cares? At some point you need to just play the damn guitar.
I certainly agree that more hours on the tubes, and other such variables, make a difference in feel and sound of tube amps.
But not all inaccuracies are the same. For example, palm mutes with profiling 1.0 feel weird, wonky to me, across pretty much all distorted profiles. It's always been an issue. Profiling 2.0 seems to aim for a fix.
In my opinion, such a problem typically doesn't occur with the real amps that were profiled, unless there's an actual issue with the amp, tubes dying, etc etc.
At the very least, I haven't had such an experience with any amp I've profiled, and there's been many.
Then on the modelling side, you may have sims that aren't perfectly the same to the modelled amp, even at the right point in time, but where the innacuracies are of a less significant kind.
So I think some of this comes down to what kind of innacuracies you can live with.
And of course there's other capture based units than Kemper, which may do a better job for the player. Tonex is capture based and I prefer the results to Kemper by far.