DACCCS is currently insufficiently mature to estimate how "reversible" any specific level of warming is, but current policies are expected to limit warming to 2 to 3 °C by 2100, compared to over 4 °C where no policies were implemented. Net zero emissions by 2050 would even be compatible with 1.5 °C, and that is well within what is achievable with current technology. Plus, with AR6, we have the first estimate of the zero emissions commitment over 50 years, and it is centred around zero, with a 90% CI of roughly ±0.3 °C, meaning it is likely (with "low confidence", meaning this is our first time doing it as part of CMIP) that changes in 20 year average temperatures will be quite small after complete cessation of emissions. That means assuming we ended up on a trajectory like 2 °C by 2100, if we wanted to reverse GSAT at least we would have a better than 66% chance of having another 5 decades of research and development and deployment (plus the 7 decades it took to get there), so once we get to zero emissions it becomes much less urgent.
There will still be permanent changes to the biosphere, but there is no reason to feel doomed.
There will still be permanent changes to the biosphere, but there is no reason to feel doomed.