I don't know how many years it's going to take to get to human-level in agency skills, but I fear that corrigibility problems won't be severe whilst AIs are still subhuman at agency skills, whereas they will be severe precisely when AIs start getting really agentic.
How sharp do you expect this cutoff to be between systems that are subhuman at agency vs. systems that are "getting really agentic" and therefore dangerous? I'm imagining a relatively gradual and incremental increase in agency over the next 4 years, with the corrigibility of the systems remaining roughly constant (according to all observable evidence). It's possible that your model looks like:
In years 1-3, systems will gradually get more agentic, and will remain ~corrigible, but then
In year 4, systems will reach human-level agency, at which point they will be dangerous and powerful, and able to overthrow humanity
Whereas my model looks more like,
In years 1-4 systems will get gradually more agentic
There isn't a clear, sharp, and discrete point at which their agency reaches or surpasses human-level
They will remain ~corrigible throughout the entire development, even after it's clear they've surpassed human-level agency (which, to be clear, might take longer than 4 years)