I like the idea of being able to braze or at least solder with the little torch, and that was part of the appeal with mine. But after the failure, and the other style not lighting as well, or being finicky, I lost some faith in them.
I don't think I've hiked high enough elevation to worry about butane, but I have seen -53 C, or -63 F actual ambient around here.
I didn't know if I wanted another CKRT, when an M16 I have got knicks in the edge from light use, but at about $14 USD, $20 CDN, or around 10(?) British pounds, I had to get a couple. Probably better knives than several I rotate. Sometimes go to a medium sized fixed blade. My Buck Compadre is currently favored.
I change up the lights too. The pen lights I worry about losing all the time. Like the Streamlight pen light, or Browning Tactical Hunter, or Pelican Tactical. Probably carry a Nebo Slim the most lately.