Sony's Q2 FY results: 113,6m PS4s Sold, 45,9m+ PS Plus subcriptions as of September 30th, 2020. 107m+ Active monthly users.

[xMetroid]

I think It is pretty clear Sony wants to get rid of the PS4 on the market. They might support it with games but they will start building their new system first. Anyone expecting a new model of PS4 after the PS5 launch, that would be really surprising.