After reading carefully, I assume Saylor's point is, after a hardfork or change to mining or consensus validation, specific GPU-like processors would be needed. The processors and the PCB would all become proprietary closed systems (as opposed to using generic processor types on specialized but various PCB types, like now.) The need for specialized (non-generic) processors (proprietary hardware) would likely require proprietary software developed in lockstep, to make use of hardware specs.

I'm not sure what hardware and software different security systems require to validate it, but seems less feasible to distribute with higher barriers due to the restraints.

Saylor seems to make sense here. Confusing but correct. I'm a layman, just my 2sats.