Disclaimer: of course, everything is a spectrum. To ADHD-people, caffeine has varying effects. Some get tired from it, others it affects less or not at all.
So what’s wrong with kg for weighing things, st & lb for people, miles for driving distance, metres for building things, C for temperature and feet for ascent of hills and stuff?
What's right about it?
But I love what you’ve done with ‘half-four’ to mean 3.30. I really enjoy doing that with my German colleagues.
That's not exclusively german though as germanic languages in general and some slavic languages use this format.