Not the original guy, but down 32%, for a point of comparison:
1) Amazing, like being a decade and a half younger
2) Not before, planning one in the next couple months, but I use skinfold and impedance and they say I've dropped from about 48% to ~20% as I've dropped from 272 to 186, lean mass seems maybe 5kg lower than I started with? Less lean mass loss than I expected.
3) Weight bearing exercise and medium-high protein intake (>80g/d)
4) Per above, starting BMI 37.9 -> ending BMI 25.9
Your stats are very similar. I started at something like 274 (though my overall highest point ever was 284 a couple years ago) and now I'm down to 181. It's a huge difference, as you say it's like being 15-20 years younger. Life changing.
To add my own anecdata, it took me a bit over a year (September 2024 to December 2025) to lose the weight. I averaged about 1.5 pounds a week consistently.
1) Amazing, like being a decade and a half younger
2) Not before, planning one in the next couple months, but I use skinfold and impedance and they say I've dropped from about 48% to ~20% as I've dropped from 272 to 186, lean mass seems maybe 5kg lower than I started with? Less lean mass loss than I expected.
3) Weight bearing exercise and medium-high protein intake (>80g/d)
4) Per above, starting BMI 37.9 -> ending BMI 25.9