> This problem only affects a minority of chips in the first place (likely a litho flaw in the cache section)
What are you basing this on? I've seen no good reporting on this* but the AMD Community segfault thread (https://community.amd.com/message/2796982) seems to suggest that almost all Ryzen CPUs manufactured before the end of June (which I assume is most of the current stock) are affected. Very few people load their Ryzens sufficiently to hit this bug, but a large number of those who attempt it seem to get the segfault.
* I would like to know the percentage of processors with the bug, percentage of review units with the bug (I would be very interested in this), and maybe some long-term testing of "bug free" processors etc.