It would be interesting to see how many times they've patched the same processor and how much slower they are now than when they were made due to all the mitigations.
Phoronix has a bunch of articles where they do this but they are on a per-mitigation basis as I recall
I can def see a world soon where all of Intel's woes have combined to the point that they've run out of patch space for their microcode updates, and you have to pick and choose what you want mitigations for.
If you are badly impacted by a bug and no one else is, you are the only one with an incentive to find and fix it. You might pay the CPU manufacturer to share the incentive with them, but you'd need quite deep pockets for this.
I wouldn't be surprised if widespread open source CPUs also had better debugging tools at their disposal.
The errata lists the same vague info: https://www.intel.com/content/dam/www/public/us/en/documents...
They seem to have gotten information about the bug from the future :P
This could also show that trhey released it in a hurry since they did not fix that typing mistake.
Is Broadwell and before not affected or are those not mentioned since their support cycle has ended? I'd be surprised with Intel spinning up Haswell production for lower grade CPUs on 22nm, but I can't be sure.
