I have vague memories of an Airtours 767 in Orlando diverting because the ILS was out and they said they were not allowed to fly NDB approaches any more. This must have been around 20 years ago. I remember being shocked at the time. But now that NDBs are being removed, GPS has resulted in NDB approaches being well on the way to becoming like Consol and other old navigation systems just a memory. You don't even have to fly an ILS on the EASA single engine instrument rating test, GPS approaches will do. This may be keeping up with the times, but I was still surprised.