A reader recently questioned the wisdom of flying IFR in "old" aircraft with traditional flight displays that lack modern accouterments—GPS in particular. It's a fair question and one that deserves some thought. I have to admit that growing up in an earlier age, and having flown IFR for almost a decade before I had the luxury of even a DME, and three decades before I experienced glass, I don't feel deprived if I have to keep an E6B and a plotter handy to periodically check ground speed and ETAs. But there is more to it than this.
This is a companion discussion topic for the original entry at https://www.avweb.com/flight-safety/technique/flying-ifr-in-older-aircraft