[magila]

No, this was definitely intentional. Intel is doing extra work to gate features on the manufacturer ID when there are feature bits which exist specifically to signal support for those features (and these bits were defined by Intel themselves!).

If they had fixed the issue shortly after it was publicly disclosed it might have been unintentional, but this issue has been notorious for over a decade and they still refuse to remove the unnecessary checks. They know what they're doing.