The feature I would like to request is the lifting of the file size limit of 512 megapixels in Lightroom.
I've been enjoying the panorama merge feature in Lightroom ever since it got introduced since it provided an easy way to create very high resolution images by stiching together a small number of individual shots. Unlike some of the dedicated panorama applications (including photoshop itself) the stiching in Lightroom produces a raw file which is imminently more flexible than the usual tiff or psd file, if it weren't for the file size limit. With a camera like the GFX 100 providing up to 400 Megapixel with pixel shift alone, already a simple two image panorama merge will exceed that file size limit. Maybe there was a reason for that limit at some point, just like there might have been one for the 4GB limit on FAT32, but with camera manufacturers pushing the resolution figures it would be nice to pair those cameras with some of the proven panorama merge features available in Lightroom. Most of my images at the moment average around 1200 Megapixels, but if I invest into the GFX100 that will almost double.
And yes whenever I do go through the effort of making images that large, than to print panoramas that are up to 6 meters in width and intended to be viewed at close distances, so please don't ask me "why would you want to do that?"
It just seems like this would be the right time to lift that limit.
Your 4gb FAT32 comparison doesn't apply. Almost everybody using computers, cell phones etc hit the 4gb limit but I am sure only a VERY small percentage of people hit the 512MP limit and its probably not worth the engineering time to implement.