That's the key.
That said, I've always bought ~2 year old phones. They usually have batteries at 85% life (or more).
I haven't had fast charging hurt one significantly yet, and I've used it a lot on some phones.
Of course, I avoid using it as much as possible. I use a slow charger (1A,max) overnight and it's on a timer. On rooted phones I use a charge limiting app.
Hell, I'm old enough to be a parent/grandparent to most of Lemmy, and I learned metric over 40 years ago...in a small rural US grade school.
Guess what - back then the UK still hadn't fully settled on metric, they didn't "fully" convert until the mid-80's if I remember right.
And they still use feet, mph, stone, etc, as they choose.
This whole metric arrogance thing is tiresome (and I vastly prefer it for many things, because of Base 10, so really it's a Base 10 preference).