I have very limited understanding of what the OpenWorm project is doing, but it sounds like they're trying to simulate the real worm in a bottom-up manner by si

I have very limited understanding of what the OpenWorm project is doing, but it sounds like they're trying to simulate the real worm in a bottom-up manner by simulating its cells / neurons? The fact that they're struggling to do this would indicate that we're nowhere near being able to simulate a human brain bottom up. But there are other approaches being tried to implement strong AI that don't involve brain simulation - for example, machine learning approaches that don't involve any human-brain data.