I think the 790/890 variants are all built in China now, is that right? Includes the Norden too?
Rode with a guy who has the Norden 901, whatever the high level "Adventure" or R model is these days. Very nice looking bike. Beefy skid plate. I really like the blue color.
I have a 690 R. Love it, very fun bike. I have dirt and sumo wheels for it. I've put 11k miles on it in 2 years, i also ride a BMW R1150GS.
As far as reliability... I'd always heard KTMs are on the bottom end of the spectrum. I bought my 690 (2016) used with 4k miles. My first ride on it, it broke down. Traced it back to to the fuel pump which is a known issues. Upgraded the pump, rode it for a while and it broke down again with the same symptoms. Replaced pump again. Rode it again and it broke down once more. I was determined to sell it and swear off KTM. Found out it was actually the spade connectors for the fuel pump in the tank were loose. Fixed those and shes been great (knock on wood). It gets ridden fairly hard and i'm not the best at keeping it clean ,so it's gone through some fork seals and a rear shock reseal, but good otherwise.
Friend (Who pointed me towards KTMs...) has had a fleet of them over the years. Mostly dirt bikes back in the day. Most recently: 790 Adventure S, had the front brake rotor/wheel issue. Eventually got that fixed but had to visit 2 different dealers. He tried a 390 (i didn't like that bike), he had an issue where it wouldn't start sometimes. Ended up being a software issue i believe. Lastly had a 890 Adventure S, had issues where the cruise control would drop out while riding randomly. Dealer failed to diagnose. Another local guy bought it. Took it to the dealer (still under warranty) for that cruise control issue and an engine noise. Last i heard they were going to tear down the motor assuming it was a timing chain noise, then decided the noise was normal. Oh, and they couldn't do anything with the cruise control.
So, at least around here, they might have some issues but the dealership seems to be the real problem in getting stuff fixed. My 690 issues can be blamed on me, i work on my own stuff.
Edit: and to add, friend who had all the KTMs now rides a BMW F700?750?GS without issues and a Honda CRF300L nicely modded with cams, suspension, etc. No issues with that thing either, except it can't come close to keeping up with the 690