David Paul wrote on Nov 26^th, 2014 at 9:59am:

I fly airways in the USA with just nav radios.  Here in the US, they are almost all still associated with VORs.

In keeping with real world routes, the challenge for the classics in the modern world is finding SIDS and Stars that aren't RNAV based. Once you get up on an airway, there are always VOR's that link them (for the most part). I don't do much IFR flight planning anymore as I'm more into GA at lower altitudes but I do remember the challenge of finding non-RNAV based arrivals and departures for my non-FMC equipped planes. I always used FlightAware and couldn't keep my routes in step with the real world as the real world has moved away from the VOR based SIDS and STARS.