Would you agree that by the time of the end of the second fiscal year that I used for the PS1, 2, and 3 that all of those consoles were widely available? Because that is why I used that as a cut-off point. The time frame itself is irrelevant.
You seem fixated on the ideas that I am somehow comparing sales. I am not. How could I when I am comparing shipped to sold numbers? I am trying to show that shipping that many of each of those consoles was more than able to satisfy all of the demand for those consoles up to that point and comparing that to Sony already shipping at least 4.2M PS4s and still, apparently, not being able to meet demand.
If I knew a way to find out the exact number of PS1, 2 & 3's that Sony shipped at the time that each of those consoles became demand limited than I would use those numbers. But since I don't I used what was available. I suspect that those numbers were each less than 4.2M, though.