If your CPU was one of the affected units with defective hardware, no amount of microcode will fix that. Otherwise get the update as usual

0x129 (plus turning off XMP) was enough to stabilize my 13700KF for now, and hopefully 0x12B will be the final nail in the coffin for continued degradation.

However, polling users here for experiences isnt going to give a good perspective on how the CPUs are actually doing. Until it's pretty far gone users may not even notice, and the small sample size of folks who'll reply here is probably not going to accurately reflect the actual state of the CPUs.

Level1techs has done some really good work investigating this at large scale on datacenters, and the takeaway there is that these problems are going to take a while to show, so its generally not a good idea to buy these CPUs til 0x12B has been out for a few months and we know the effects, at which point Arrow Lake will probably be a better option.

tl;dr if you're going to buy right now, buy AMD 7000, but if you're willing to wait til February or so, it'll be a decision between the new gen of Intel CPUs and current AMD CPUs (only 9000 series will probably be available by then).

Their latest microcode update from 7 days ago was declared as final. Time will tell about the efficacy of the most recent fixes.

Unfortunately it may only be available via board partners as beta BIOS updates at present.

I anticipate the used value for those gens is going to drop quicker than a Mercedes CL65AMG