Lol, obviously I meant that Sony is denying others from making replacements, not denying that they're replaceable.
And "partnership" means that Sony gets to dictate what's OK and what isn't, and in addition takes a licensing fee. That's anti-consumer, and IMO shouldn't be allowed. If people buy the console, they should be allowed to mod it however they please. Sony in turn can deny warranty if the mods were a reasonable cause for the issues, since of course they shouldn't be burdened by people being idiots.
But this is simply a scheme to seize profits by selling official Sony sanctioned plates.