I have a newer EX21 with a factory stand and I've been disappointed. Previously I had a Delta that I bolted to the top of a work bench and I loved that. Mine new stand has wheels, which are a necessity because, when no in use, I store i in another room. IMHO I think the factory stand, when on wheels, has too much vibration. The last couple of projects I lifted it up and put it on jack stands. Less vibration but a PITA. I wish the height were adjustable. Some day I'll try making a stand. If I had a smaller saw I think I could put it back on the bench?
You can certainly make arguments for either approach. I doubt if there is a right answer. It's just personal preference. It's why the Crayola boxes come with more than one color.