Under the outer walls that support the roof and/or additional stories there will be a sizeable footing that should go below the frost line. But inside the footing where the foundation is just supporting the first floor you only need a few inches of concrete.

Musk is a shitty person therefore everything he is affiliated with must also be terrible. Sure his management style is terrible but that obviously hasn’t stopped SpaceX, and he actually claims to be deeply involved in R&D there. I’ll be worried if/when the actual serious researchers and engineers involved with neuralink start whistleblowing over safety concerns.

I’ve found bits of plastic trash in almost all of the potting soil I’ve bought. I’m at the point where I think a heavily filtered hydroponic setup is one of the only ways to really minimize microplastics.