"But now we can keep you alive long enough to squeeze out an extra decade at your desk" is not exactly a silver lining.
Surely it would seem like grumbling to dismiss it as: "Now they can keep you alive long enough to squeeze out an extra 675 years at your desk."
This might be rather millenial of me, but I don't view retirement as some long-deferred tasty dessert for being a good compliant worker who eats their vegetables... as much as a someday-unavoidable lifestyle transition.
I wonder how this would play out economically. Most of us here could probably retire by 100 (and many by 50) and have enough accumulated wealth to live off interest. Could we have a world where that many people live off interest forever it would the extra productive years create enough inflation that it's not feasible?
Either way I'd imagine you'd be able to live a more relaxed life. With 50 years work experience you'd probably be very effective. Your probably only need to work 2 or 3 days per week.