Wow, that is really nice. I too have built cabinets for all my bench tools, but I haven't yet gotten around to putting drawers in them. Putting a door and/or tight fitting drawer fronts like that on your stands really helps keep the sawdust out. I like the way you made the cabinet to fit within the steel frame.
My DP sits on a cabinet that was originally designed to keep my shop laptop from freezing. It had a radiant barrier lining, plus 2 inches of foam lining the entire inside and a greenhouse thermstat that controlled a 40 watt incandescent bulb. A thermometer inside showed it never got below 45 degrees, even with freezing weather and snow outside. The foam lining precluded drawers, so I installed shelves separated by vertical 1/2 inch ply. I should probably add drawers, but that would require pulling out the foam insulation. I just can't bring myself to do that. The thermostat now controls the heat in my office shed and keeps the computers and printers warm.