VOR required for IFR certified aircraft?
Buddy and I bought our first plane today - a low-hour, cherry condition 1965 Piper Cherokee 150.
It's currently a VFR aircraft. Has old, 4-knob ADS-B out, Garmin 250XL GPS/comms, Stratux cup-mount ADS-B in on an ipad, no VOR at all, and all-old-school steam gauges. My buddy has his PPL and is working on his instrument rating (been running a 172 at a flight school). I have done ground school and passed the written and about to start the flight part of my PPL. We would like the aircraft to be IFR-certified, and we are considering avionics upgrades. The Garmin 355 or 375 would make the most sense, but neither has VHF Nav and VOR capability. Buddy says pretty much all modern approaches are WAAS GPS with RNAV or VNAV. If that's true, is it accurate that we don't really need to worry about adding VHF Nav for VOR/ILS?