Something else occurred to me: DC-DC switching is an inherently noisy design. It produces switching spikes which are notoriously difficult to filter. If you a

Something else occurred to me: DC-DC switching is an inherently noisy design. It produces switching spikes which are notoriously difficult to filter. If you are working on an electronics project which is sensitive to noise, you currently have the option of ditching your cheap, efficient DC-DC bench power supply and instead using a linear power supply, which is far less efficient (instead of producing the desired voltage by converting power, it does so by turning the extra power into heat), but is a very low-noise design. If we switch to a DC grid, there'd be no point in using a linear bench supply to develop a low-noise project, because those nasty switching spikes you were trying to avoid aren't coming from your supply, they are coming from the grid!