There's also the fact that the Orr report does not actually measure campaigns played in any way - it measures games created. The five 1e campaigns that I created that never got past session 0 count for as much as the 1e campaign I gmed to completion.
Roll 20's Pathfinder 2e support is abysmal - it took them a year to get some supplements on there, and they've already announced they're not even going to carry the most popular 2e adventure path, Abomination Vaults which is getting a robust Paizo-official release on Foundry. The PF2e community writ large actively de-recommends Roll 20 for the game, because their support is just that abysmal. After 2 years, they don't even have spell heightening automated for cantrips. And the sheet is hideous. Fantasy Grounds gets more support both from the community and officially (from both Paizo and FG), and Foundry has the heaviest community support currently and just got a bunch of official stuff released and incoming while still having a much lower barrier of entry, cost wise, than R20, since you don't have to buy every last book to use the stuff - it's all from the SRD, with only the true adventure content costing anything.