In Joel Wiley’s route above, Q866 and J85 are airways, specifically high-altitude airways (aka jet routes. If you plug that route into Skyvector and switch to the “Word Hi” layer (skyvector.com/?ll=43.52863784706 … A:V.K7.AMG), you’ll see where the airways appear. Note that Q866 runs from from IKLAX to SYR, and similarly J85 runs from SPA to AMG.
So in that particular case, having the airways in the route is kind of redundant since the route includes them by default even if only the intersections/VORs are considered. Or, put another way, Q866 and J85 aren’t actually waypoints, they’re routes between waypoints.