57 here, obese since age eight. Peak weight hit 288lbs. The target number kept shifting the whole way through before finally settling at 138, hit that milestone last week. Can't say the mirror fully matches how it feels inside, body image distortion is real, but overall feeling good. This weight seems maintainable, and it lands in a healthy BMI range, not by much, sitting around 23.7, but realistic and sustainable given everything else at this age.
Biggest suggestion is treating the end goal as flexible. Getting a body-composition scan done is always a smart move, and listening to the body matters. A sibling hit goal weight but started passing out, added back ten pounds and immediately felt way better. Aim for healthy and happy overall and let the actual number land wherever it needs to.