Don_c55, I tend to agree with your list of necessary features and I realize you said SOTA. I believe the OP referred to arms in the $6K and less range, and while all these features could possibly be incorporated in a $6K arm, sometimes the elimination of a feature is an engineering decision.
For me, VTA OTF is a necessary feature and I would give up calibrated azimuth adjustment to have it. Azimuth is set-and-forget adjustment, and while a calibrated azimuth might be convenient for cart swapping, I think it's more likely to compromise performance.
Even though this thread includes a lengthy travel log and fanciful stories, I enjoy reading personal opinions and comparisons and wish there to be more of that. I think these opinions are equally valid as a prof. review, maybe more so.
In the spirit of time spent, already compromised, I ask everyone (not you Don), can't we move on?
Regards,