I do have to say that I was skeptical at first of how much it would change my lower body, thinking that some kind of surgery would be the only way. I still have some skepticism that HRT will be enough to reach my goals without spending my life in a gym- I guess I am just not a gym type of person? Anyway...
After 18 months of HRT, I have yoyo'd between very skinny and +15lbs TWICE now in my transition. I started very skinny & moderately muscular. The first time I gained 15lbs during month 5-6- it all seemed to go to my abdomen (or exactly where it used to). So I wasn't too happy with that! Then, I lost all the weight during months 9-12 and slowly kept losing it through month 14.. getting down to my lowest weight in 3 years. It did seem like some of the thigh fat stayed, but not much. This was concurrent with when I had FFS.
Then recently (around month 16-current) my appetite increased, and I listened... So, I've yoyo'd back up to +13. This time though, MUCH more of it has gone to my legs, butt, and hips. I mean I can hardly believe it. Honestly sometimes it's hard for me to stop touching myself 😮

My legs squash out around the sides and hips when I sit now, it is a VERY noticeable difference while sitting.
But I think that some kind of procedure will be in my cards someday, hopefully with an improved way of doing fat transfer.. I don't have much fat to work with, and I wanna make it count instead of just reabsorb 😛 I'll be first in line if they figure out how to use stem cell fat transfers for hips. Tbh, for me it is almost as (if not more) important than SRS- but I'm not letting it hold me up waiting around.