We have much more than 15 more years of temperature rises to come. It's not like we reached net zero in 2026 or have a plausible plan to reach that anytime soon. Net zero is probably another few decades away.
The point is that even if we did get to net zero today heating would continue to rise for another 15 years. That's what the lag is. Whenever we get there, add 15 years.
True, but not much of an issue I think. I'd assume we reach net zero very gradually and fifteen years before net zero will be pretty close to zero already. But oh well, first we need a clear downward trend of global emission.