The albedo effect problem you mentioned is likely to happen faster than predicted as the latent heat of melting isn’t considered. The heat it requires to melt all that ice will instead heat the water around the remaining ice at a much higher rate.

Just no. Ice sheet response tends to be parameterized, where a computationally simple approximation is used, including this.

IPCC doesn’t account for the aerosol cooling effect. If we cut our emissions there would likely be a rapid warming of 0.5-1.0°C within a couple of years as particulates in the air are blocking less sunlight.

This is complete nonsense. They’ve been accounting for it for ages. That’s where figures like this come from.

The ice sheets don’t melt at a steady rate.

This is well known, and widely discussed.

Last time this much carbon dioxide was in the atmosphere they ended up retreating 600m per day which should affect predictions.

This appears to be from a single study of a particular set ice sheets off Norway which were grounded below sea level. Thwaites is like that, but much of the big ice sheets are not. Ice melt isn’t some simple thing which will happen at the same rate everywhere.

Not strictly a feedback loop but worth mentioning… The earth contains less than 20% of the copper needed to produce the renewables required to replace fossil fuels over the next 20 years, about 20% of the required nickel and less than 2.5% of the required lithium.

This is a serious misreading of what’s going on. There’s enough in the earth’s crust, but trying to depend only on existing mines would be a bottleneck. That’s why a ton of new mines are opening.