You have a magic pill, which de-ages you by 20 years. You can take it once in your life only, so long as you are at least 20. What age — past, current or future — do you reckon is best to take it?
I think there's a certain power dynamic that comes with looking and acting older. If you look the same age or younger than your kids, that power dynamic is most likely going to slowly shift. It'd be like if you're in your 40s working for a guy who looks like he's in his 20s. While possible, I imagine it'd be a challenging arrangement. Not to mention how your kids would feel about your decision as a parent to take an age reversal pill.
I think there's an assumption that kids are about 20 years younger than the one taking the pill, this will not always be true. In the US women's median age for giving birth had hit 30 in 2022, I would expect that age is even higher in men.
So, if you're 45 and your child is 15, after taking the pill you'll be 25 which looks like an adult enough for a 15 year old
Out-of-sync not only in lifestyle but you'd now be young enough to possibly outlive your loved ones. Thats a special hell, I'd imagine, burying your parents, wife, and children all because you took a pill to make you younger.