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.
This is strictly untrue for many climates. Where I live in Canada, 0F is average winter day, 100F is record-breaking “I might actually die” levels of heat.
-30C to 30C is not any more complicated or less intuitive than -22F to 86F