It is that simple, you're just noving the goal posts. The concept of profiles is nothing new to ensure HW decoder compatibility and JPEG-XL offers nothing extr

It is that simple, you're just noving the goal posts. The concept of profiles is nothing new to ensure HW decoder compatibility and JPEG-XL offers nothing extra there either (except no support for the concept ensuring that HW decode isn't possible at all). Pretty much all newer formats are tiled in some way too - even JPEG.