Adding 5 years to the end of your career will (on average) cutoff 5 years at the beginning of the next generation's careers.
However that is your prerogative, and does not deserve some of the comments you have received. The only thing I would ask if people stay longer, that some of the minority "whingers" who stay on, cheer up. Having escaped to the LHS I don't suffer it anymore, but F/Os I fly with still get the "I hate the airline/wife/world" bitter rantings. If you don't like it GET OUT and get a life you do enjoy.