The older console uses less advanced chips, is simpler to make and provides a budget-friendly alternative to the flagship model.
PS5 shipments top 7.8 million; PS4 tops 115.9 million - Gematsu
With the PS5 Shortage Over, Will the Price of the PlayStation 5 Drop?
PlayStation 5 Units Will Remain In Shortage Until 2022 End, Sony Claims - Digpu News
Sony is dealing with PlayStation 5 shortage by making more PS4s - The Japan Times
Sony dives most in two years after cutting PS5 sales outlook - The Japan Times
Sony will continue making PS4 consoles throughout 2022 due to PS5 shortages
Sony profits soar as it benefits from home entertainment boom, Sony
Sony will continue making PS4s as PS5 shortage continues
The PS5 Is Starting to Look Like the Revolution It Promised
PlayStation 5 “Long-Term Supply Issues” Are Resolved, says Jim Ryan – GTPlanet
PS4 sales crash as Sony doubles-down on PS5 production
PS5 Stock Shortages are Still Prevalent; Sony Decides To Make More PS4
Semiconductor Shortage Affecting PS5 Stock a 'Crisis' and Getting Worse
Commentary: It's still near impossible to get a Sony Playstation 5 - CNA