My Hegner Polymax is the only one of my saws that can be slowed down. I use it just for doing my inlays, I have it set up to the angle required for that and it is user friendly. I just do not want to re- set the angle whenever I make toys, or anything requiring a 90° cut. I use my jet saw for that. I have a 25" Hegner under my bench as a back up saw. It is single speed and runs and cuts very well but the tension release on all my saws are at the rear and 25" is a long reach while seated. When I need the extra length I do take it out and use it though. It, and the Jet, are single speed saws.
I spend much more time at a scroll saw making toys than I do in making inlays. Scroll saw time, when doing inlays, is less than ten minutes. Often just five.
Toys, I mass produce, making fifty at a time, so I use that 15" Jet saw quite a bit.
I would love to make more inlays but selling them is not as fast as making them is.