I don't see one with the work I do. Maybe I'm wrong.Last job was about 12,000 foot of straight ditch. Doing a pool like you showed I would cut two walls and reach across as I dug down the last wall. I guess it's all in how you get used to doing things. I've done acres of scattered trees with excavators, shove them over and hook a tooth on them. Having several different machines also cuts down needing more tools. I do find myself using the excavators more, my 18,000 lb. machine has a hydraulic pin grab which is priceless. Buckets from 1 to 5 foot and a bobtach to use any of my bobcat attachments.