Stevelup
It matters not how you look at this there are places that you can't fly to IFR without ADF & DME if you want to stay within the law.
While I am very pro GPS ( my aircraft was fully leagal for NP GPS approaches back in late 2007 ) I am not so obsessed with the GPS that I will chuck out the ADF & DME during the current upgrade to WAAS GPS. For the forseable future all of this equipment will have its place for IFR flight in Europe.