This is why real computer science is pencil-and-paper work, not a sub-field of electronics.
Electronics is great because we can create some specific fast, reproducible physical phenomena with it (logic gates, symbol storage and retrieval). But any physical principle that can create fast, reproducible phenomena would be just as valuable for computing. Diamond Age posits smart-books that operate on atomic-scale "rod logic" mechanical phenomena. Cells do something that looks an awful lot like computation with protein chemistry.
Electronics is great because we can create some specific fast, reproducible physical phenomena with it (logic gates, symbol storage and retrieval). But any physical principle that can create fast, reproducible phenomena would be just as valuable for computing. Diamond Age posits smart-books that operate on atomic-scale "rod logic" mechanical phenomena. Cells do something that looks an awful lot like computation with protein chemistry.