Hold on, why are you worried about being stranded? I put 109k on my '12. Yes, I suffered a catastrophic CCT failure, but I also had YES in place and it was covered. Took 4 months, but the bike ran like new when I got it back. Better, due to the upgraded clutch I had them do at the same time.
With all the miles myself and other forum members have put on Super Teneres, they have not proven to be failure prone bikes. Not knowing why yours failed or what was damaged or any history, I can't speak for your individual issue. I can say that the bike with a replaced motor is no more likely to have an issue than any other Super Tenere. They are proven to be reliable. If your specific bike had some flaw that caused the failure, the likelihood that the new motor would have the same flaw is incredibly tiny and it likely would have become known by now, with 5 model years of Gen II bikes in the wild.
When I decided to upgrade to a Gen II, it had nothing to do with the Gen I bike. It was about life taking me in a direction that made me want to have YES coverage for another 7 years.
I chose a Gen I non-ES and swapped all the things I could over to the new bike. The buyer of my '12 scored with a fresh engine, brand new forks, new rider seat and more because I kept upgraded items from my old bike. I had already upgraded many things.