The miter saw in my 12x24 shop is not the star of the show. I have it set to have 5-6 feet on the left, with a roller stand set up to support the piece on that side. I've marked the height and the exact floor placement for the stand so it's easily set up. The right side of the saw rarely has more than 18 inches of support. Up til very recently my HF DC unit took up the space on the right, but that just got moved outside into a protected space, so I could use another roller stand on that side, although I haven't needed to do so yet. I try to be as careful as possible about having everything square, I by far prefer the table saw for accurate cuts, and for frame miters, I now prefer to use the Ts and an Incra 1000 miter gauge. I use a Lyon miter trimmer to perfect the 45 angle and occasionally if I'm feeling persnikity, to true up a 90 cut (such as face frames).
My miter saw is a Bosch, 10 inch sliding compound model, really accurate when I take the time to make sure it's set up properly. Last time I worked on an exterior fence, I dragged the saw out onto a 5 foot folding table, but it was awhile ago. I'll probably hang it on the back of my pickup tailgate for the only 2x project I've done for a long time.
So basically I'm saying about 4 ft on each side for a station. I just don't use it enough to justify using up all that space, even though the cabinets underneath would be nice to use. I suppose I could put some tools on the counter space so I could make more use of it, but I don't really want to lift most of them anymore. I'd rather just move the roller stand.
Beside all that, there's the matter of all flat surfaces get loaded up with stuff in many of our shops, especially the small ones.
The more I do, the less I accomplish.