Because it is effectively a superconductor! An electron (or proton) with some velocity will keep going in a straight line forever. This is neglecting the influence of stray background magnetic fields and gravitational fields, but the general notion applies.
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Dumb question but why isn’t a vacuum considered an infinite grid of resistors?
Because it is effectively a superconductor! An electron (or proton) with some velocity will keep going in a straight line forever. This is neglecting the influence of stray background magnetic fields and gravitational fields, but the general notion applies.