If you think about it for as long as I did, you will find that the moment everything went sideways is when general-purpose computing devices started having their initial bootloader in the mask ROM of the CPU/SoC. Outlaw just that, say, by requiring the first instruction the CPU executes to physically reside in a separate ROM/flash chip, and suddenly, everything is super hackable. But DMCA abolition would certainly be very helpful as well.