Yea, I'm honestly surprised this is a thing still. I've not thought about the tab vs spaces "war" in years; because of Vim. I just hit Tab and whatever the pre-defined standard is, be it tabs or spaces and space count, is used.

Visually I can have it display in my editor of choice (Kakoune at the moment) however I want.

I guess I'm just saying, I would have thought the most common answer to this question would be: Whatever my employer / language standards dictate.