When it is started to be found in the shelves on stores... so the demand will be gone and the supply will > demand like Xbone is situation.
so let's say in June the PS4 sells 300k in the US according to NPD, but there are no shortages any longer, you will say this was the month the PS4 reached its peak?!
No, this is not what peak actually means.
And demand is not gone when there are consoles in stores! 650k people bought a Xbox 360 last month, so there is still demand for this product. You need to read up on very basic economics. Again, no personal attack, but you just spread something you have no clue about and use the wrong vocabulary.
Imagine not having GamePass on your console...