Here we go.......granted this is a 7x12 but the principles are the same on a 4x6. Show me a sub-$800 circular saw (the 7x12s are easy to find at >$800) that can cut 7 sticks of 1 1/4" sq tube while I'm on the other side of the shop welding. The auxillary clamps are just to hold the lone stick on top, allowing for cuts of odd numbers of like stock.
No noise, no heat, minimal burrs, .035" kerf, blades last months if you're careless, up to a year if you're smart and cost $25 to replace (Irwin), and that's assuming you're buying them pre-welded. Will also cut wood, plastics, stainless and solid stock of any sort as long as it's not heat treated. Factory provisions for stop rod for repeat cuts of the same length. And the chips fall - - what?? -- into the chip tray.
Can be set up vertically for contour cuts or rip cuts in delicate materials. I recently had to cut small squares out of .100" thick acrylic sheet and this was the best way by far to do it. It's no replacement for a dedicated vertical bandsaw but still VERY useful.
And note how far my blade guides are closed up - coulda cut twice this many at once.