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Sony have stuck with BSD too. The PlayStation 4 and 5 both run FreeBSD.

The PS 4 yes does run a subset of it, however I am yet to know about the PS 5, given that I no longer have access to the SCEE technology site.

Where did you got the information regarding PS 5 from?

According to some folks on Twitter / Reddit it seems to be running FreeBSD 12. Someone ran an nmap to try and fingerprint it.