"Even after PlayStation 5 is released, I think PlayStation 4 is going to be the main focus for a while longer."
Funny how we see this sentiment from Japanese third parties every gen, and only with Sony consoles.
Whether you mean this positively or negatively, it has benefits as PS4 will still probably have engagement. Even Sony expects it for a couple more years though I need to find that source. And with PS4 games being able to run on PS5, it is a win-win for everyone.