The instrument panel (collectively) is a major tool for the pilot, and for IFR flying, maybe most of the resource of the pilot. Basic flying is the same, though airspace, navigation, communication, and engine monitoring may be very different than they were when these aircraft were first built. It is probable that a change to newer "tools" is appropriate.
If it's just a Cub or Moth bimbling around VFR, the basic old instruments are enough. But, VFR in complex airspace, or long journeys, or IFR really benefits from newer equipment. Instead of thinking of it as spoiling a vintage aircraft, I'll think of it as using new instrumentation to keep a vintage aircraft right up there in utility.
A panel I made for the refit of a C182Q
