Static shelves with bins holding small parts take up a lot of space. It's interesting to see this case study of how a traditional warehouse was able to use wasted air space to reduce storage area by 94%.
They demonstrate it in warehouses as well as businesses with a lot of specialty tools. Eventually, most part pickers will be automated, too.
It reminded me of these cool old vertical car parking machines from 1930s Chicago:
• Automated Vertical Machines & Parts Trays Maximize Storage Space (YouTube / SpaceSavingStorage)