Yes it looks ‘clean’, but it's hella confusing.
Weather apps are a prime culprit at the moment. The default iPhone weather app using a 24 hour clock and centigrade (i.e. most of Europe) is a great example.
Very hard to read fast and confusing even when assessed carefully.
It's not that you can't work out what everything means from the context, it's just much slower to do so. Don't make me think.