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.
Minnesotan here. Can confirm that 32 is still long-sleeve shirt weather.
I regularly see people here walking into a store from the parking lot in T-shirts, in 32° weather. Wind chill makes a far greater difference. 38° from wind chill is far colder than 32° with no wind.