They have their NPOV[1] policy, and seem impressively unbiased to me, given the various divisive situations they have to try to cover.
[1] https://en.m.wikipedia.org/wiki/Wikipedia:Neutral_point_of_v...
As a non American this is very obvious to me.
Even Reuters that was supposedly meant to be a non-biased media outlet is clearly left-leaning at this point
I've been guilty of pointing out that the US doesn't really have a left wing, according to the textbook definitions of things, but that's not how people usually talk. People really are talking about the median when they say "politically neutral," even if they shouldn't.
And here's the point: the median can certainly shift as the number of media sources shifts, or if you prefer, as the culture shifts.