PlayStation 6 chip chosen back in 2022, partly over backward compatibility
Briefly

According to a report from Reuters, it has been confirmed that Sony's next-gen PlayStation console, the PS6, will run on AMD chips, ensuring backward compatibility with current PlayStation 5 titles. The decision to use AMD over Intel was influenced by potential complications with backward compatibility that an Intel chip could have posed. Historically, Sony has supported backward compatibility between its consoles, which signifies its intention to maintain this feature for the PS6.
Sony's commitment to backward compatibility is evident in its previous consoles, as the PlayStation 2 played original PlayStation games effortlessly, and the early models of the PlayStation 3 supported games from its predecessors. Although the PS4 broke this trend by not supporting PS3 games natively, Sony provided an alternative by offering access through emulation. This history supports the notion that the PS6 will prioritize compatibility with PS5 games.
Read at Polygon
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