"For more than a decade, climatologists have seen clouds as the biggest source of uncertainty in models." I remember learning back in the 90s that the climate

"For more than a decade, climatologists have seen clouds as the biggest source of uncertainty in models." I remember learning back in the 90s that the climate models of the time did not include cloud cover, and was immediately sceptical of any predictions the models produced. Sounds like the models are still pretty bad. How can we be confident of IPCC warnings if the models still can't accurately factor in couds and vegetation?