Understanding that your post may have likely been rhetorical, incase it wasn't:
It was pretty much the same situation — all the well-regarded JHP manufacturers were pretty close in terms of cost in 2019.
For 124gr JHPs, I think PD was 8.8 cpr back then and MG was the same 9.6 cpr that it is today. I don't remember what RMR or Everglades were cpr-wise, on account of immediately eliminating them from consideration after calculating them to be more expensive than PD and MG (not by much, but I figured why bother paying even a fraction more when PD and MG's were available for less and already top-flight).
Nowadays, PD is 10.6 cpr and MG remains at 9.6 cpr. They've flip flopped on who is the cheapest out of the two, but are still within 1 cpr of each other.
I think the majority of reloaders consider both brands to be of excellent quality and on par with each other, so outside of brand preference (seems as though there is a decent amount of badblood among the community with regard to MG as a business) I'd imagine that for many people it just comes down to cost and availability. For JHPs, MG availability was significantly better than PD during 2020. No idea about 2021 as I never looked. PD availability seems significantly better than MG for 2022 so far.