I'm sorry, I wasn't clear.

When I was young, the ongoing story was that we'd be doubling and tripling our life expectancies by "the next century".

Consider that the largest single component of that extra ten years of life is reduced infant mortality. This is very laudable, but preventing babies from dying isn't "life extension".

Breakthroughs were promised - but what we got was steady incremental progress on preventing some common causes of death.

Nothing in those 50 years made any difference to what seems to be a hard limit out at 120 years.

There really hasn't been any major improvement on "life extension" at all. We've simply gotten better at curing some major diseases and conditions that previously killed people, but these haven't changed the expiry dates of all the subsystems that make up a working human.