One of the reasons I keep my tools cased is because when I have them out in the open they accumulate dust. Here in NE Florida humidity is always a concern, as my shop has no climate control. I would rather have moisture condense on tool cases rather than the tools themselves, plastic cases don't often have this problem. If I had more cabinet space, I would be more tempted to ditch some cases for tools that I primarily use in the shop, but the tools on shelves would remain in cases.
If you ever want to peruse some decent tool storage ideas for small spaces, many contractors are ingenious when it come to arranging their trailers. Check out some of the contractors forums for their trailer set ups, like Contractor Talks thread job-site-trailers-show-off-your-set-ups
If you ever plan on selling your tools in the future, cases also ad a few dollars to the sale price, even more so with vintage tools, so you might want to care for those old cases.
If you ever want to peruse some decent tool storage ideas for small spaces, many contractors are ingenious when it come to arranging their trailers. Check out some of the contractors forums for their trailer set ups, like Contractor Talks thread job-site-trailers-show-off-your-set-ups
If you ever plan on selling your tools in the future, cases also ad a few dollars to the sale price, even more so with vintage tools, so you might want to care for those old cases.