As CPDLC isn't instantaneous, there is a massive reluctance to use it in my centre. Hardly anyone uses FANS unless transferring to another centre (so you don't have to disconnect it when it fails). There is such little traffic equipped and logged on that by the time more are able, ATC will have carried on as normal and the system will almost be redundant before it has got off the ground.
But the bean counters are still certain some systems will be CPDLC only somewhere in the foreseeable future.........
