Thanks, I thought you would know.
I am thinking the time may have come for a parallel low voltage system
ion houses with some standardization in low voltage appliances so we
only have a single, high efficiency supply, perhaps battery backed up.
I know there are dozens of wall warts around my house for all the
various things. I try to keep them unplugged or switched off when not
in use but it doesn't always happen. There are 5 on this PC alone.
For PC-related things, I often grab the power for ancilliary
devices from the PC's power supply. That works fine for some
external disks, scanners, and ethernet hubs I've used, and it
also means they go off when you switch the PC off. It's a
non-starter for some external modems and printers though, as
neither external power supply terminal is anywhere near 0V
relative to the connection to the PC, so they have to have
isolated power supplies.