Didn't Swissport at Heathrow actually close one day without notice? I seem to remember utter carnage being unleashed with long haul arrivals landing with no one to turn them? About 2004-ish?
To me it's like parking an aircraft at Victorville for 2 years, it might return to service but it'll be forever a Hangar Queen as they're never quite the same again after extended idleness. The whole industry is like that now, it will take a long time to stagger back onto it's feet IMHO and hopefully the days of treating handlers and security staff like disposable baristas so we can all save a fiver on that holiday are forever gone.