A PlayStation-related patent has been doing the rounds on social media with many suspecting it could point to full PS5 backwards compatibility (BC) with the PS1, PS2, PS3, and PS4. Although the mystery around the patent has likely been solved, there are still some who question why Mark Cerny's PlayStation 5 BC graphic looks incomplete.
https://www.notebookcheck.net/PS5-backwards-compatibility-Likely-PS-Now-patent-invigorates-debate-on-whether-Cerny-s-PlayStation-5-BC-graphic-was-deliberately-incomplete.480817.0.html