On my current jobsite (36 story residential high-rise) we are using Wagos exclusively. Splicing speed is up. They are excellent for changing splices (pull & turn works) - especially when they need to be done live. Works well for us as we pre-rough-in common areas and stairwells for egress lighting which isn't feasible to shutdown.
Also find the conductors are easier to fold into the box when they aren't twisted together.
I see lots of sloppy work with wirenuts. Usually from those who use a battery drill - they get carried away twisting to the point where one of the wires in the splice breaks or slips out.
