Again, the landscape is completely different. As I said, Sony could sell 30M PS5's in one year, that is the level of hype, digital "revolution" and general gaming industry status that we have in 2020-2021. Its not even close to 2013 where not only did we have many more foundries producing chips, gaming landscape wasn't as big as it is today (it was at the bottom actually).
Sony will produce more PS5s then PS4s till end of Q1, of course, but so will MS. And they will both sell it all, even though as it currently stands PS5 would take a big lead over Series if they weren't supply constrained - which they are. That is an issue Sony is having right now. They will sell all PS5s for next 2 years I think, but they will only sell them against what they can produce, and they would certainly want to produce more.
The question in my mind is how will ps4 sales hold up? As I understand it ps4 will stay around 3 more years. PS4 has potential to break ps2 sales record. At least it will act as entry level cheaper console. What happens when those ps4 users might upgrade to newer gaming device is interesting to see. Holiday season this year is interesting as it might be ps4 will also be sold out or on other extreme people might only want to have next gen consoles.