Even simpler at 302 for adults, their nervous system is completely mapped out and I'm still incredibly impressed nonetheless by how much technology has progressed in my lifetime to make something like that possible

Since worms usually survive electric shocks (and people usually survive seizures), the connectome is probably enough; there probably isn't anything vital in volatile memory. Less-volatile memory like DNA methylation has been proposed to be a significant memory mechanism at the per-cell level but so far, as I understand it, there is not good evidence for this.

https://www.embopress.org/doi/full/10.1002/embj.201387637 seems to be an overview of the situation from a few years ago.