I disagree, the more we can help isolate the issue the better.
Until we have more reports of issues with regen with just a firmware update and no other changes (given the widespread rollout of 42.x), I'm not really convinced. In either case whatever you are experiencing would be a separate issue. This discussion is about the almost unanimous reports that snow tires are causing these issues across all fw versions.
The problem is confirmation bias. The thread titles and timing is misleading. 42.x was rolled out around the same time as winter tires were being installed. Also, the first incoming reports were with RWD because the bulk of Model 3's in the field are RWDs. Now pcon confirms his AWD shows the issue. Myself and at least two others on this forum have reported an issue with regen around the same time when the firmware was updated (with non-winter, AWD). Simply there is not enough data to support that a) this is a winter tire-only thing or b) this is a RWD only thing.
I do believe that winter tires are exacerbating a firmware flaw with the Model 3's regen. I believe that it is more prevalent on 42.x than 39.x. I don't think it's exclusive to RWD.