PlayStation 4's primary competitor, Xbox One, was discontinued right around the time Xbox Series S/X launched. However, we didn't get that confirmation until January 2022.
It is abundantly clear that PS4 is very much in its twilight. First-party releases have all but stopped, and hardware sales are only about a few thousand a week.
When do you think PS4 will be discontinued? For reference...
PS1 was discontinued 23 March 2006.
PS2 was discontinued 4 January 2013.
PS3 was discontinued in EU/AU March 2016, NA October 2016, and Japan 29 May 2017.
Lifetime Sales Predictions
Switch: 151 million (was 73, then 96, then 113 million, then 125 million, then 144 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 67 million (was 60 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima