One of those debates that never ends, such as with crank tapers and certain frame geometry topics.

But at least the supply of BioPace chainsets looks really good going forward for years to come!
If you like the ratios offered, you have it made (and at very low cost).
Thankfully, all of the early-90's BioPace-equipped bikes turning up at garage sales and thrift stores will have the later/best SG-version chainrings.
But sadly, the "touring-bike era of the eighties" seem to only have offered the older ring shape on the touring bikes having BioPace, typically having 52-44-26t chainrings (at least the 52-44t drop was cleverly made to be only 8 teeth when dropping off of the rounder big ring, so less of a shock to your spin).