Another differentiating factor is the wavy red underline for misspelled words, with the implied meaning that unless you choose the right words, a diplomatic email could result in rivers of blood, or red ink. Being a metal head, I prefer the former, since a passionless life is the death of a million paper cutes.
Oh, there were a bunch of things like this.
For example, in Teams, you can type an at sign and then start someone's name and it will autocomplete their full name so you sound like an angry parent scolding a child. But, you can hit backspace. So someone wanting to address me as David does @Dav{tab}{backspace}.
But a lot of other cultures have very different conventions for names. Indian ones are a staggeringly bad fit for this, which is surprising for a company whose CEO is Indian. There's no way of both notifying an person and using their preferred form of address for a huge number of cases.
@david_chisnall @ashwin Presumably the solution is for people to be able to set “Preferred name”, like HR systems sometimes do, and when you autocomplete you get a choice between the parent scolding and familiar versions? Also useful when a small team has both an Andy and an Andrew and they are very clear which one is which.