This is important to power an electric kettle to make tea.
True here in the UK. A former work colleague, in his youth, acquired a drum memory unit that required three phase. He got it running by taking one phase from different floors in the halls of residence where he lived.
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On the general point about 240V computer hardware availability, it can be a stumbling point. To my knowledge, the Kensington System Saver for the Apple IIgs was only made in a 115V version.