Well if your business can ‘t move with the times, may be time to change to operating trucks. Or coaches. Or boats. But wait .... your competition only runs modern kit there, too.
Jeez, even hotels buy new bedding every couple of years.
If aircraft operators can’t plan to re equip every 25 or so years, may be they never were viable, or may be they should have had an exit plan at the 20 year mark.
Turbines have been on the scene for well over 25 years, so what did the piston engine people think would eventually happen ?