I use ones which I inherited from my former work, which are semi-automatic.
I can't find a picture on the Internet, so I'll post a photo tomorrow.
They don't look the linked item, but may be similar in operation.
They are like pliers, but with a row of cutting teeth of different diameter.
You put the wire in, and as you close it, the mechanism does several things in sequence.
It closes the cutters around the cut-point, and then it closes some grabbers onto the tail of insulation to be pulled off, and yanks it a few mm down the wire.
They work really well for wires of the intended diameters, in particular, electrical T+E, which can stand fairly rough handling.
For very thin wires, mechanical stripping can often just rip the wire as easily as the insulation.
For these, I use the old soldering iron of meltyness ( the one you use to make holes in plastic cases ) to 'chop' the insulation ( assuming it's not some high-temp insulation that can't be melted in this way ), and then tease it off with my fingernails.