A new report from Bloomberg states that Sony plans on manufacturing up to a million PS4 consoles in 2022. It will serve as a low-cost alternative to those who are unwilling/unable to get their hands on a PS5, which will be short in supply for the foreseeable future.
https://www.notebookcheck.net/PS4-production-to-resume-through-2022-as-a-stopgap-solution-for-PS5-stock-shortages.592033.0.html