>>6How would you make a bugfix? upgrade?
I would instead encode a turing-complete VM inside a big multi-layer logical abacus with many slide rulers for quick approximations and create a class of semi-religious importance(tech priests) to maintain and build such abacuses.
Computation would involve following rules written on tablets, engraved in metal plates and duplicated in books spread worldwide.
Will probably last thousands of years.
https://scienceblogs.com/goodmath/2006/10/02/square-root-on-the-abacushttps://www.quora.com/How-do-I-calculate-cos-sine-etc-without-a-calculator?share=1https://en.wikipedia.org/wiki/Slide_rule https://en.wikipedia.org/wiki/Logical_abacus https://en.wikipedia.org/wiki/Mental_abacus <-- this will be core practice for tech-priests