You can very easily see ugly banding if you try to use an 8 bit format to store HDR images, and that's all you get with normal jpeg.
But I’m sure there are some that will say 64k of RAM is all anyone will ever need!
The cost of HDR displays is decreasing, and the data cost is minimal. (adding more bits to video actually decreases the size because the rounding errors get smaller)
If I had a black and white tv, all my content is there, how would I know if they had color versions?
Ok, a little over the top on the last one, but still correct.