Why are you asserting it "wasn't going to happen"?
The whole Paladium trusted boot/"known OS environment"/etc stuff could very easily have gone down the path of "This hardware only boots Windows." Secure Boot has been a pain for a while, though at least you can turn it off.
Nobody at the time (as far as OEMs) seemed to care the slightest bit about Linux, so the concern of "Only boots a measured Windows install, for your own security" seemed rather worth worrying about.
Palladium is coming again, and this time for real, with Windows 11 and its default "Secure"/Measured Boot (de facto) requirement - and all the infrastructure in place for Internet endpoints to attest that their peers have actually been booted that way.
The whole Paladium trusted boot/"known OS environment"/etc stuff could very easily have gone down the path of "This hardware only boots Windows." Secure Boot has been a pain for a while, though at least you can turn it off.
Nobody at the time (as far as OEMs) seemed to care the slightest bit about Linux, so the concern of "Only boots a measured Windows install, for your own security" seemed rather worth worrying about.