That's how ours is. We have one drive on with a scissor jack that uses compressed air. The other three are two post symmetrical - they're better for access but they honestly make me nervous - especially with short wheelbase trucks like Defender 90s or short wheelbase Jeeps.
Yep...that's pretty much like ours - except we only have one trolley jack. We only jack one axle up at a time when it's on the drive on.
We try to keep it open during the day - it's used for oil changes, inspections and diagnostics and brake jobs. If it's going to be on the lift for more than 1/2 a day it goes to one of the two posts.
Me being the lazy bastard I am used the lift the other day to get the rockers of the accord up to chest level to wax. It was really sweet not having to bend over or sit on my ass in the driveway to wax that thing. I think a 4 post would really get in the way when doing **** like that, especially around the front and back. In my opinion, and it is pretty limited because I have never worked in a real shop, I think a 4 post is for oil changes, exhaust, quick maintenance work, and long term storage. I would want a two post for everything else. Something I have noticed is how much you can quickly diagnose things on a lift and how much more you see while walking under it as opposed to crawling around under it on the ground. Tire wear patterns, rock damage, oil leaks, etc. etc. If I would have known how badass it is working under a lift I would have pushed a lot harder for one a lot sooner.
Boats and hoes
Stumble in to the liquor store
With a dollar-fifty for a bottle of wine,
I know just what I'm lookin for
Thunderbird will do just fine.
FWIW, my friend's shop has a 4 post for the alignment, the rest of the 6 or so lifts are all 2 post.
The disco ball in my mouth, insinuates I'm ballin'