37-at that age when lines when my lines were first starting to show, it was good. I kept it up until I had it done by a 'therapist' who put too much in, and my medium size forehead, started to look twice the size. By my 40's, lips had become a 'thing' and I was in there at the beginning (of the consultant surgeons wife who unbeknown to be had just started 'dabbling'). It resulted in my thin lips being pumped up to the point of ridiculousness, and dropping the bottom line of the top lip on the right and left of my mouth, (note: nobody seems to escape this problem; its the first thing I look at. Teeth that used to be exposed to a little of life/vitamin D/flashing an odd pearly white, hiding behind the new voluminous pressure of the filler.
Roll on to your late 40's/early 50's, and nothing looks authencially youthful as by now you are a walking advertisitmet for cosmetic procedures, with your plastic large forehead and your missing incisors, possibly enhanced with a look of puffy weight gain, from badly injected fillers.
Personally, I can enthuse about this topic,
a) because I'm old and have tried a few of them/watched how the generations play with them. Nobody bothered with their neck or hands - looks most odd to be smooth in parts at 50, but with a neck like a turkey
b) I was lucky enough to have some bad jobs in my experimental years and have learned from it (looking at you, botox consultant who injected too much botox which yes, smoothed out my forehead wrinkles, but also pinched my once pleasant looking eyes, into piss holes in the snow - another 'look' that's common
c) I get why people want to try it, I really do, we all want to look our best
In summary, you can maybe stave off aging in your 30's & 40's, until menopause. Then the shit hits the fan, unless you have a facelift, neck lift and hand lift, you are kidding nobody, and potentially looking really odd. Also, there is something extremely liberating in not giving a shit about wrinkles and ageing any more. I wish I could bottle it.