And an interesting question is will existing external drives work with this PS5? Or will Sony go to some lengths to prevent external drives working with future PS5 and/or prevent PS5's external drive working with other platforms.
To be fair to Sony, when it comes to drives, they've embraced standard drives and USB devices since the PS3. So.. maybe.
They didn't have slightly customized firmware on the optical drives?
I ask because I know Microsoft had that (customized optical drive firmware) on X360 and maybe still has it on the One and Series consoles. The X360 even had the drive and mb "married" so you couldn't swap it out for another unless you spoofed the key. I don't know if the pairing continued with Xbox One.