Don't just vendor - rebuild the ecosystem and persuade the vendor to work on software management ...

Closer to 22 than 21 (with the spec available three years before that). But eh, that doesn't change my point. Most of us are using (recently-compiled) binaries that will natively run on two-decade-old hardware. I'd wager that a majority are still using (still recently-compiled) binaries that will natively run on three-decade-old hardware (ie 'i686'), and in some cases, four-decade-old (ie 'i386') hardware.

...As it turns out, "freezing the world" is utterly necessary in practice.