Yeah but is it really that much faster once you factor in setup and cleanup? Jigsaw you just grab and go, no need to mess with a track or worry about the blade drifting. I've seen guys spend 15 minutes getting a circular saw dialed in for a cut that takes 30 seconds. Plus with a jigsaw you can actually see the line, track saws you're always guessing unless you've got a laser guide. Not saying it's not a good tool, just that the speed difference isn't as dramatic as people make it sound for most basic cuts.