Why does OTRS even use password authentication? All OTRS agents presumably have Wikimedia accounts, so wouldn't OAuth be a more secure and convenient method?

Why should 75% be used as the threshold anyways? RfAs explicitly require a supermajority consensus because the presence of a significant minority means that the candidate is not sufficiently trusted. For community policy decisions, we've always used the standard of "some vague amount greater than 50% depending on the rate of participation and strength of the arguments". In practice, the threshold is often closer to 60-65% for a discussion of this size, or 55-60% for a discussion with hundreds of !voters (assuming that the strength of the arguments on both sides are average).

In fact, @CptViraj had explicitly called for a non-bureaucrat to close the discussion, to avoid the appearance of impropriety of deciding something that would give them more permissions.

Yet another one, currently still broken as of time of writing: https://upload.wikimedia.org/wikipedia/commons/5/53/Lower_Manhattan_from_Governors_Island_August_2017_panorama.jpg.

I can report having seen this problem in several incidences as well, including https://upload.wikimedia.org/wikipedia/commons/8/87/St._Venantius%2C_Wertheim%2C_Nave_20160802_1.jpg.