Can someone explain to me whether this is probable? It's horrifying

https://academic.oup.com/oocc/article/3/1/kgad008/7335889

Hanson and some other researchers have published a few studies in the last few years arguing that climate sensitivity is drastically underestimated, and that Aerosols and other factors like long term centuries long warming will lead to dramatic and unexpected changes in temperature.

What is the scientific concensus regarding Climate Sensitivity and is there any validity to these concerns? Are we "Locked in", is warming really in the pipeline garenteed? in a net zero world would temperatures continue to rise for decades or centuries?