There are a couple I have in mind. Like many techies, I am a huge fan of RSS for content distribution and XMPP for federated communication.
The really niche one I like is S-expressions as a data format and configuration in place of json, yaml, toml, etc.
I am a big fan of Plaintext formats, although I wish markdown had a few more features like tables.
Who is Kalvin? Did you mean kelvin?
One drawback of celsius/centigrade is that its degrees are so coarse that weather reports / ambient temperature readings end up either inaccurate or complicated by floating point numbers. I’m on board with using it, but I won’t pretend it’s strictly superior.
A degree Celsius is not coarse and does not require decimals in weather reports, and I suspect only a person who has never lived in a Celsius-using country could make such silly claims.
Consider that even if the difference between 15° and 16°C is not significant to you, it very well might be to other people. (Spoiler: it is.)
Then your suspicions are leading you astray.