But there are SO many chipsets they put out. e.g. I have a Core 2 Duo system, but the exact chipset is T9400. Intel could keep track of which chipsets are vuln

But there are SO many chipsets they put out. e.g. I have a Core 2 Duo system, but the exact chipset is T9400. Intel could keep track of which chipsets are vulnerable and which are not, and carefully pick which kind gets released to who. Obviously, Intel employees aware of the strategy would only use the invulnerable chipsets themselves.