I used to do a fair amount of field work so this system of drill and tap storage worked well for me.
I am grounded these days but often get a call from mates with motorcycles for help with something so always take these in my tool box. I still use this system in my home workshop for the most used. I have hundreds of drills & taps so laying them out in an organizer would take up half my workbench. Yes I know ideally they should be separated but so far the convenience outweighs the ideal.