Tough books are already modular and very repairable. Not really upgradable but that’s a minor concern given the market. The testing necessary for the certs is

Tough books are already modular and very repairable. Not really upgradable but that’s a minor concern given the market. The testing necessary for the certs is expensive, and these are 99.9% procured by governments and large companies, complete waste of time and money for framework.