With Windows and PowerToys it's ways easier:you type a letter and the right arrow and you get all corresponding diacritics including greek/cyrillic variants.Yes, I am sure it is logical to those languages. To outsider it seems just weird.
I guess they have an acute lack of kbd space when they are dealing with something like this: 😵💫 😂
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By the way Macs still have trouble to type m³ or km²...