Are NDBs and VORs dying as a navigational method?
Yes, without a shadow of a doubt. Many airports now publish GNSS (Generic term for all types of satellite navigation) approaches, completly negating the need for those aids even during complex, critical phases such as approach and landing and take off and departure.

Modern GNSS systems are capable of utilising synthetic VORs where even when doing something such as flying a particular radial, the aircraft actually uses it's GNSS data to do so.

And, if you needed outright evidence, how about this quote from the UK National Air Navigation provider (NATS):


  Commercial aviation – which has always funded the upkeep of the VOR beacons – now almost exclusively relies on the use of satellite navigation (read last week’s post on EGNOS for an example), making the majority of beacons an expensive and unnecessary financial burden. As such by 2020 we will be reducing their number from 44 down to 19.


Source: https://nats.aero/blog/2015/05/has-gps-killed-off-the-vor/