Apart from some notable fonts of knowledge on this site and over at ADV , do you feel alone with this bike? Servicing is becoming a difficulty. It seems that this bike simply separates the knowning mechanics from the dumb plug and play types. Alternatively one can use this bike as a source of personal achievement wrt aquiring knowledge and skills. Keep the bike...learn from it ..it isnt worth much as it stands there but its potential to help you feel good about yourself with problem solving skills is notable. Most others simply take their bikes to another and get someone else to do any hard work. It sounds strange but this bike stops me from getting bored. There are quite a few who check in regularly....keep the faith ladies. There is more to keeping a bike than just having it sit in the garage and riding it occasionally on fine days. The potential of this model was so impressive that some fellow thought best to buy the factory and close it immediately...always ask yourself why did he do that? The answer is clear and loud.
I have owned a few "less common" and "orphan" bikes over the years and so far this one has been better than most as it has so much BMW DNA in it and because of the internet in general. Now, I have not had any notable running issues nor have I tried to mess with the fueling or any other motor related changes beyond a Wuka spoofer. Does it have the wealth of knowledge/info/aftermarket of say the KLR or DR, nope, but for me it has really not been that bad. Try to find info or parts on a Montesa, Bultaco, SWM or Fantic back in the 80's and 90's in the US. As far as the bike beeing so good it was the cause of the BMW/KTM ownership change/factory sell off. I like the bike, but know it had nothing to do with it beyond the timing.
The owner community and all the wisdom it's gathered here and over at advrider makes all the difference AFAIC. And having a popular bike doesn't protect you from mechanics who don't know their stuff.
I think this thread topic has already been argued to death a number of times over the years since BMW announced the sale to KTM. The people who have no problems still own their TRs. The people who thought the orphan status it was a problem sold theirs. and Everyone is happy