Comment by atonse

Also the 0 and 100 is at sea level.

If you actually measure a boiling pot (assuming you aren't at the beach), it will likely not be exactly 100 degrees, but less (or more, haven't had my coffee so I can't calculate).

So for most day to day stuff, it's equally arbitrary. And pretty much _nobody_ needs a thermometer to tell if something's boiling, you wait for a rolling boil. Or frozen, you wait until it looks like ice.

So again, great on paper, but in day to day use, not necessarily more useful than F.