That’s what I am. I’d have to put quite a bit of effort into gaining weight (I’ve tried, because it’s hard to find clothes). There’s nothing wrong with me in terms of long term conditions or consequences of being this weight. I exercise but not excessively, I run once or twice a week and I do a bit of weight work. I got pregnant and had two healthy babies at this weight, and dropped back down to this weight within a week of giving birth both times with no effort at all. It’s just where I land.
I do worry that if I ever become seriously unwell, I don’t have a lot of spare capacity to lose weight as a side effect of illness or treatment.
But as things stand right now, I think I’m fine. I’ve been this weight my whole adult life with no issue.