> Aren’t you just remembering specific numbers though?

That's the thing about this. It's so tiring for people to argue which temperature scale is "better". Nothing is better or worse. What's "better" is individual, and is just "what you grew up with". Because right, you're just remembering specific numbers, and remembering how those temperatures feel. (Or in the case of cooking, remembering what those temperatures do to your food.)

> Unless you’re trying to boil water unseen so that you can only see a thermometer, the specific 100°C mark isn't that useful.

Even then it's not that useful, as water doesn't really boil the way most people think it does. (And god forbid you aren't at sea level and aren't at standard temperature and pressure.)

Also if you set something to heat water until it's exactly 100C/212F, it probably won't be boiling when it gets there. Some bits of it might be bubbling, but it won't be what we normally think of as "boiling".