The PlayStation 5 can finally play your old PS2 discs - here's how

Your PlayStation 5 console can now finally play PS2 games from your existing discs, provided it meets a few requirements, ...
TweakTown

The PS4 is getting unofficial PS3 backward compatibility via a ported RPCS3 emulator

Independent developers have ported RPCS3 to PS4 and booted PS3 firmware, but the early build is not available to download and cannot run games yet.
The Droid Guy

Easy Ways To Fix A PS4 Not Reading Discs | Unrecognized Disc Error

Is there anything that you can do if your PS4 is not reading your game discs? The answer to the question really depends on what is causing the problem. If the cause is software-related, you’ll most ...
Ars Technica

Console hacker reveals PS4/PS5 exploit that is “essentially unpatchable”

Does this mean if I have a hacked PS4, create a PS2 ISO (from the stack of PS2 games I have sitting on my shelf), I can then use the PS4 to create a PS2 on PS4 disc? If so, I wonder how well this ...