I have my Shop Fox cabinet saw on a SF mobile base. With the large size of the table and fence I wouldn't have it any other way. If it's in the way, I can move it. Need more bench space in another location? I can move the saw. Need to pull the lawn mower in for service? Move the saw, and just about everything else to the back. Mobile bases give much variation in the way I can use my shop. I have them on the band saw, jointer, dust collector, ShopSmith (drill press, disk sander, lathe), B&D workmate (planer) and 2 roll around toolboxes. I'm trying to figure out how to get my 2 workbenches on wheels. All of the machines are on Delta bases or Harbor Freight Delta clones except the SF and the SS--it's on the SS wheels.
With the proper mobile setup you will not need to worry about the machine moving while you use it. It would be a concern if bases were done improperly. Hope this helps.