Obvious shitty capitalism aside, electronic shelf labels would have saved me SO FUCKING MUCH TIME when I worked retail. Way too much of my day was hunting down the expired sale signs not taken down because I didn't work the night before and/or being the one that had to go through and replace them that night.

But of course, it would have HELPED so the company wasn't gonna spend money on that shit, we needed a new middle manager to micromanage the too few people actually working on the sales floor.