if the world gets to net zero, then (apparently) no further warming will occur (does this mean runaway warming -from lack of reflection via ice sheets, methane release from previous permafrost zones, etcetera - is no longer expected?).

I followed the links in that quote:

Climate models have consistently found that once we get emissions down to net zero, the world will largely stop warming; there is no warming that is inevitable or in the pipeline after that point.

Neither addresses tipping points. They seem to talk about something else entirely, like wether a model assumes constant atmospheric concentration, or constant emissions, that kind of difference.

"Runaway warming", as I understand it, merely describes the outcome, the effects, while being agnostic about the causes. My current understanding is, we ruled out one possible cause. Tipping points like sea ice or methane hydrate are still on the table, AFAIK.