svt- our shop doesnt supply alot of tools, only the specialty ford tools, so everyone basically has to buy their own. or if its a shop tool everyone buys an extra if they know they use it often. it sucks trying to hunt down a tool with 25 techs sharing it and you know time = money
as for why an investment on a good box- as svt says the drawers, try to load craftsman with 200 lbs worth of tools. the materials they use is another factor. ex. when i installed my top chest, empty with no drawers, i had about 4 really big guys try to just lift it up the ground, and they couldnt even do that. ended using two cherry pickers to balance both sides to install.
if youve made this your profession, you usually want the biggest you can afford. your ALWAYS buying tools, each and every year. you really dont want to run out of room, which would mean trading in your old box and almost starting all over again with payments for a new box.