also bosch has a track saw but no dust collection. i'm about to knock down a bunch of 3/8" acrylic. and i can't imagine the mess i'd be dealing with if all that ended up on the floor.
a track saw and a panel saw are not the same. yesterday i joined a frame a bit catty cornered. i was a few degrees off 90. and the next piece didn't quite fit. needed to shave 0" at one end and about 1/16" at the other. that won't happen with a panels saw. not to mention the sheet was .030 aluminum. a panel saw would chatter that to pieces. a track saw is a fabricators dream. and when i need to i can clamp three sheets of 3/4" substrates together and cut them all at once, no problem. not to mention, i can keep the whole stack clamped, run around it and keep cutting. i guess you can clamp sheets and put them in a panel saw, but maybe it's not quite as easy. also, the weight. i'd rather move a track at 10lbs instead of a sheet at 75lbs. i'd use a panel saw to make crates. but it's just not ready for high end fabrication.