Side shift backhoes have their advantages, but they have disadvantages as well. Advantages are being able to dig a square or rectangular hole for a tank without moving the machine, digging against a foundation or off the shoulder without having to **** the machine diagonal to the work, among other things.
I owned a John Deere 410 with a side shift hoe that used a hydraulic motor for the boom swing rather than cylinders. This set up doesn't have the torque that the pistons do so it was very difficult to move the machine if you had gotten stuck by hoisting it and swinging. With a full bucket and boom extended, it was often difficult to get the boom to swing uphill if the need was there, it would move but it would take some time for the motor to overcome the weight.
Those outriggers might look nice, but they are much less stable than extendable stabilizers. This is due to their position, they are much closer in to the machine and offer less leverage against tipping. They often times will not lift the machine as high as extendable stabilizers either which could be a problem under some conditions.
Side shift hoes have their place, but they are not the best machine for every job.