You have to start wondering if they will use quantum behaviour like Anderson localisation that sets up a standing wave effectively stopping electrons from tunne

You have to start wondering if they will use quantum behaviour like Anderson localisation that sets up a standing wave effectively stopping electrons from tunnelling in certain places (design it to bias against and/or stop gate leak tunnelling). Svitlana Mayboroda discovered a lanscape function that allows you to predict (and hence design) this kind of behaviour. As to how actively using these kinds of quantum behaviour affects feature size / speeds / feeds / yields will probably eat several tens of millions / years as well.