I suspect battery life will probably be more an issue than filling one of these up.

But, IMO your looking at it the wrong way as your not their target market. This is for HD video not camera's.

Still, the goal is not to fill the tings to capacity it's a cost / benefit trade-off is 500$ (800$ - 300$ for a 256 GB SD card) worth being able to take more than 256GB worth of pictures. And in that case it might be worth it simply to reduce the risk of missing a great shot. Even if they rarely want to go though 3,000 pictures looking for the best ones. There is utility in basically never running out of space. Plus a few applications where you might actually fill a 256GB card.

You seem personally offended that someone said they can see a potential use for a card of this size.

I am personally offended that I express disbelief that 1000 photos are 512 GB and people are arguing that the card is useful.