It is important, but more important is having absolute 0, which Celsius doesn't have.
The other problem with Celsius and the boiling point is that the boiling point changes depending on air pressure, which changes depending on elevation. So it's not always 100°C.
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I care very much about the freezing point of water outside. It means ice on the roads.
0F is also works for that application too in a slightly different way, it is when a salted road starts to freeze back and becomes slippery again.
My point was about in the chemistry lab, not outside.
I don't work in a chemistry lab. But why is the boiling point of water not important there?
It is important, but more important is having absolute 0, which Celsius doesn't have.
The other problem with Celsius and the boiling point is that the boiling point changes depending on air pressure, which changes depending on elevation. So it's not always 100°C.