Those who don't understand why call it OCD -
Before the systainer came into my life I had already hyper-organized my garage...beyond what most would think is reasonable. However I didn't learn it at home, I learned to obsess about it when I had my own manufacturing business where I stumbled across lean manufacturing (before it was know as that). The epiphany came about year 2 in the business where I learned that optimized tool access/storage and minimizing movements and effort resulted in more of everything. More production, more profits, more free time...more. These concepts carried over into the home shop almost immediately. Lots of well organized drawers, minimal shelves, and all tools should be accessible in as few movements as possible and always have a very specific spot.
After working nearly 2 years in home remodeling projects I found my home shop organization to have one fatal flaw - it was designed to optimize efforts within the shop and home remodeling projects were never in the shop. Id gather up tools and carry them inside only to need a tool I hadn't grabbed yet. Sure I went right to the tool in the garage but the excessive back and forth was killing me. Then you gotta put that crap away because the wife doesn't want to see and walk around it all week just so you can do it all over again the next weekend.
I found my Festools to be the easiest to move in, around, and out. I could bring in most of my tools in a single trip including a vac! So here's the darn epiphany ---
If my shop drawers were organized, and they were very much so, then all I really needed to do to perfect my organization was to have some of my drawers be specific to function and be fully mobile. The Systainer was just the perfect vehicle for such an activity.
I do refer to myself as OCD all the time but only to those who don't get it.