Ask HN: Why there are no digital photo frames with OLED display available?

Aren't OLED displays the perfect fit for photo frames? Photos could nearly look like real pictures.

But I can't find a photo frame with OLED display. Kodak made one years ago (Kodak OLED OL 7620) but it's not produced anymore.

I also tried to build one by myself with a Raspberry Pi or so, but even simple OLED displays aren't available outside of TV sizes.

Is there a reason why smaller OLEDs aren't produced?