What he's making is basically caveman technology compared to actual cutting-edge nodes.
No offense to his accomplishments, but the modern fabs like TSMC are so advanced you cannot just make the things they make without billions of capital investment. It just is not possible.
Unfortunately, many of the chips in short supply are on pretty small nodes, so you need extremely specialized equipment limited to a few of the big players to make them.
Certainly there's some stuff that can be made in larger nodes, but if you want something in 5nm you basically have one game in town.
