Having been SE for many years, my experience(s) with concierges has been most variable. When living in Edmonton, I'd often get calls about flight delays from the concierge. Once in Toronto on my way to LHR, I was greeted and walked through security by one, much impressing my colleague. At the other end, CP's old concierge (David?) was the most amiable and helpful, and he appeared in the BBC series "Airport" and parodied in another British satire on the airport and an LCC. However, when I really needed help with tight connections or cancelled flights of late, they've been nowhere to be found to help. So losing them would not be a great loss in my opinion...particularly as I have decided to ditch AC generally.