Can 2 Playstations play on the same account at the same time?
Can I use my PSN online account on two PS4 consoles at the same time? Previously you could only be signed into one PS4 at once but at some point Sony has changed it and you can now sign into multiple systems simultaneously. You can't launch games on more than one console at a time though.
Can 2 people use the same PlayStation Plus account at the same time?
While you are a PlayStation Plus subscriber, you can share selected benefits on one PS5 console with Console Sharing and Offline Play activated, and one PS4 console that is activated as your primary PS4 console. Online multiplayer (subject to parental control settings).
Can I have 2 PS5 with the same account?
Yes. Each acct gets one “primary” console and can login to any other one as well. The benefit of the primary console is that any account on the console can play all the titles purchased by the primary acct. You also don't have to be online for license checking.
Can I be logged in on PS4 and PS5 at the same time?
One cool feature of the PS5 is that it's a standalone thing. Like PS4 before it, you can play on your last-gen console and your new one from the same account simultaneously.