Not right now it isn't, at least not yet.
I completely agree.
Literally everything you stated (other than NAM being free) is incorrect.
- Most people buy tube amp rigs still. All digital amps of any kind are still the minority AFAIK
- The list of products supporting NAM vs those not supporting NAM is silly lopsided toward "not supporting".
I agree. First, most people don't have a bunch of amps of their own to capture/profile. That means that the majority of users that buy a capture device are downloading existing captures/profiles and tweaking them. IMO it isn't that different from a pure modeler except there are MANY fewer starting points to start tweaking from.
Even a tube amp rig with pedals will be tweaked. Of course, the options for tweaking are much more limited, but certainly no one buys an amp and turns it on and doesn't touch anything but the volume and gain knob.
Great tone is great tone. It doesn't matter how you got it IMO. It does matter some how hard it was to get there though. This is what I think Stadiums strength will prove to be.
I also think they are not a picky in their tone as we older players

.
It is literally the only way I have ever made rigs I use live. While I profiled my VHT and my Fender BF and by buddies MESA MKII and my friends Randel .... and those profiles were very good copies of those amps compared A/B, I found profiles I liked better on the rig exchange in some instances, and paid in others. Those are now my go-to live rigs. I also found great amps I didn't even know about doing it this way (Morgan AC20 anyone?).
I actually consider that to be one of Kemper's greatest strengths. You can easily tweak a profile to the sound most pleasing to you.... ok .... at least I can. YMMV.