[AlyssaRowan]

If they were restricting controllers from the start, that would be one thing, and controller exclusivity is something every console manufacturer right back to Atari has always thought about from the very beginning - mostly for cash-grab reasons, but also, much later on, with this very excuse. It's why the original XBox's USB controllers were a different shape.

But to me this feels like a clear-cut case of interoperability, unilaterally and unconditionally removed after the fact of the sale of both millions of consoles and controllers (both first-party and not). Are they sure they want to do that? Now?

This also reminds me very much of Sony's removal of OtherOS in the PS3, and I draw the analogy with what happened to the console's security afterwards very much in mind.