We already have a single atom transistor (https://en.wikipedia.org/wiki/Single-atom_transistor https://en.wikipedia.org/wiki/Single-atom_transistor), but you're

We already have a single atom transistor (https://en.wikipedia.org/wiki/Single-atom_transistor https://en.wikipedia.org/wiki/Single-atom_transistor), but you're right that it's far from commercially viable.