After 101 pounds down, what non-scale proof actually matters?

I hit 101.8 lb down this week, 18 months in. I kept waiting for some cinematic moment. Instead I logged it, ate lentils, and went to bed early. The weird part is that this milestone is making me more skeptical, not less. I do not want to trade one set of hype for another batch of peptides or supplements. For those who have been past this point for a year or more: what non-scale measures actually changed your decisions? Waist, resting heart rate, A1c, lifting numbers, sleep? Did you keep the same markers, or swap them as weight stopped being the main story? I’d especially appreciate clinician handouts or review articles over vibes.