Here's a more technical one: health information
It's a huge pain trying to transfer health information, between patients, doctors, different clinics, hospitals, etc. If you try and move far enough, your records might get transferred as a bunch of PDFs or scanned images on a CD.
There is no good standard that ticks all the boxes, so it's not just a matter of getting everyone to agree. A solid standard that addresses all the needs would be amazing, and it would help improve healthcare so much.