For me, its the power up-down going between jointer and planer and the accuracy of the position read out.? You can dial up a board thickness.?
On the shaper, its more about position (elevation).? Tweaking a setting is accurate and convenient.? Dropping the rig below the table and then coming back to a set up is handy as heck.? Tilt on the shaper and saw can be easily accomplished with a magnetic base electronic angle finder or an app on your phone.?
I don't have? power in my saw but think returning to a position like with a dado set up would be nice to have.
I have had no maintenance issues.
Jonathan Smith