In an effort to get back on track, I'll restate what I do think. This is purely recycle from 23 hours ago, but everything seems to be tangents since then. Maybe there is more to discuss here and maybe this is the end of the conversation until more information comes along.
But that said:
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I have no idea what Paizo's standard of "success" is. I've never claimed to. I've already directly commented on Paizo being well diversified and probably doing just fine.
None of that means that PF2E has moved the needle on their long term position in the Fantasy TTRPG market.
I claim that PF was not doing well enough so they need to move the needle.
I claim that developing a PF2E costs a fair amount and needs to move the needle to justify it.
I claim that Paizo and the PF brand could move the needle.
PF was in the exact same #2 place. SF is the game that bumped it, and we have no reason to think that PF declined at that time, it seems reasonable to presume that PF was till at roughly the same levels and SF was just above that. (No doubt some underlying long term slide continued).
It is only the announcement of PF2E that triggered the crash of PF.
But as of right now it is reasonable to claim that PF might be being PLAYED more than PF2E. That may not be true. But it doesn't have to be, because it is "close enough" that it is reasonable to claim.
That is not moving the needle.
I fully expect PF2E to hang on to #2 for the immediate future. I don't know of anything likely to knock it off. As has been pointed out numerous times, everything not 5E is so far back that is becomes a mash.
Based on the fact that PF's diminished sales were still handily good enough for #2, it is entirely possible it would still be limping along at an unacceptable but "solid" #2 today had PF2E never been announced. This is, of course, unknowable.
But PF2E has not moved the needle looks like a really reasonable conclusion.