It definitely depends on what you are building and what you are trying to validate. I use this sort of board to do product validation with early customers. It’s much easier than producing the full DFMed board, and sometimes it’s much faster & reliable than something soldered together. For reference, on my Thermostat project the green hand wired project board took probably 2 hours to assemble, the PCB motherboard takes about 10 minutes.

It’s also great for producing a couple boards when working with other engineers, I can more easily guarantee that we are working with the same hardware setup because all of the connections are made on PCB.