Airporter is indeed a local success story. The management at BFS could learn a thing or two from them. I do have two minor gripes about their offering: 1) their buses are tiny, and 2) £30 rtn is a bit steep.
Anyway. LDY serves a broader catchment than the city of Derry. A lot of users come from Donegal. And, as I’m sure you’re aware from your frequent trips to Derry, the road remains a disgrace, regardless of what Google suggests. BHD is likely a lot handier to access for the majority of the population of Belfast. Should we close Aldergrove as a result?