Forgive me for sounding like a broken record but I'll say it again because a certain penis erased my post history:
It may not be quantifiable because I think Series S will stop being mandated in the middle of or late in the generation. Whether we count the S and X as the same console will be a controversial topic in and of itself.
If developing for Series S continues to be a requirement throughout the generation, and Microsoft regularly sell it for $150 (or $200 with a free game) in the 2nd half of the generation while also significantly improving Series X production, I predict an optimistic 65-70 million units in this scenario.








