Do you say "Burma" or "Myanmar"? There are many who deliberately use the former despite the latter being the official spelling in English.

Indeed, by choosing one or the other, you could be implicitly taking a position on that country's internal affairs .. even if you aren't aware of the issue.

Recently there's been a lot of support to use "Kyiv" instead of "Kiev".

Almost everyone now uses "Beijing" instead of "Peking", excepting a few cases.

"Bombay" or "Mumbai"? "Calcutta" or "Kolkata"? (See https://en.wikipedia.org/wiki/List_of_renamed_places_in_Indi... .)

Do you refer to the city in New Mexico as "Hot Springs" or "Truth or Consequences"? (Or as "T or C")?

There's quite a few examples I could come up with, which means it's not that uncommon. And you see uptake depends on many factors.