Interesting, that’s perhaps where the idea came from then. What I witnessed was actually on a MacBook Air running macOS maybe 10-12 years ago, probably a versio

Interesting, that’s perhaps where the idea came from then. What I witnessed was actually on a MacBook Air running macOS maybe 10-12 years ago, probably a version of macOS before they really improved the native pinyin input. The person had installed a third party input method (icon was an S is all I recall) / manager which changed by default how the shift key worked as you describe, it’d keep using that input method but it’d be in English mode. I recall thinking shift was an insane default but it did explain why she used CAPS LOCK to capitalize single characters.