The longer you live, the closer you get to downloading your brain into a clone body

More years usually = more healthy years, that's how you end up with more years. Chronic disease wears bodies out faster, not more slowly. I'd rather get it over later, and yes with something quick.

Sure there will come a time when I am uncomfortable every day but at near 60 still do yoga, eat well, sex every day, nothing hurts, very good quality of life. Didn't expect it but I have it for now.

They're talking about stretching out the whole ageing process. So if you live longer you also grow old more slowly.

Rats average lifespan is 3 years, but that doesn't mean they are really healthy, and then just drop dead, they go through the ageing process at a hyper-accelerated rate. Equally if humans had a lifespan of 120 years the old age part would move to around the 100 years mark, you wouldn't start getting old at 60 and then just be geriatric for the next 60 years.

This misconception is why I and many others prefer the precise wording: gaining healthy(ish) years.

You don't die of 'old age'. You die of disease(s), which become more and more likely as you accrue damage throughout your life. You can't really extend the period someone stays alive with end stage dementia or cancer. If anything, you can only prevent, halt, or slow the development of the diseases. And that's what's meant by longevity/extending life.

Granted, you'll still accumulate non fatal issues. But I'd argue you can lead a meaningful life with knee pain and far sightedness.