In a way i understand your concern Sillypeoples, probably unlike the US some european states actually build new DMEs or VORDMEs as a backup system for GPS to enable DME/DME operation which is good down to RNP 0.3, of course in a multisensor-system with IRUs.
On the other hand it is much cheaper to just use SBAS and GPS and no further ground based navaids, although a satellite segment needs maintenance as well and as far as i know GPS maintenance is far behind schedule.