Poor Sony, can't make a streaming only device with an OLED screen without making it expensive yet Valve can make a device that runs game natively and that includes an OLED screen for $549.
My point is that they obviously can make it, they just chose not to do it because they don't care enough, they care about making only the bare minimum and are scared of trying anything serious on the portable space. I loved my first gen Vita and it's sad that Sony went out of their way to kill it and now are scared to try again.
Sony doesn't even care to patch their own games or work with other devs to patch some of the biggest PS4 games to run at 60fps on the PS5 while some dudes with a hacked PS5 can do it, I rest my case.
PS5 era PlayStation leadership is mostly lucky that Xbox leadership somehow sucks even more.