Designing UX stuff for disabled people is surprisingly hard. There's a huge array of disabilities and non-disabled designers can't fathom the challenges by themselves so I can imagine it's a very lengthy iterative process.
It was also probably never a huge priority for Sony until the X-box released their own and showed there's a market for them.
It was also probably never a huge priority for Sony until the X-box released their own and showed there's a market for them.