I saw her last few talks at VCFeast. Always extremely engaging to hear from someone with as much skill and knowledge as her. Amazing to hear how she built her own debugger for the (i believe, i have the memory of a goldfish) Atari 2600. I always tried to catch her talks if possible, if just to get a glimpse of what the past looked like. I'm going to miss having those to look forward to.
Well "system that calls functions in a loop" doesn't sound like it is from a science fiction story. Obviously, that is no good if you are trying to sell science fiction fantasies to people.
The answer is in the link you clicked: U-boot will be maintained as the open-source project it is, with some engineers previously working at Denx going to a specific different company with the express purpose of supporting U-boot.