> What about cities that were originally segregated via red-lining, but now remain extremely segregated along those same geographic lines today even after those policies have been eliminated? Is that systemic racism?
Disclaimer: This is mostly exploring a society where racism (as it is traditionally defined) has been completely removed. This isn't what we have (we both agree on this point), but the exercise is still useful in theory.
Assuming all such policies are removed, I would confidently say "no" for lots of reasons. Firstly, integration doesn't happen the moment racist forces are removed. Minority groups can and often do self-segregate for reasons that no reasonable person would identify as anti-minority racism (e.g., the social stability in a shared culture, hatred for people who look like historical oppressors [I guess this one is racism, but not one that is talked about under the rubric of 'systemic racism'], etc). Secondly, all else equal, a system in which wealth grows linearly would still see a growing disparity between disparate races even apart from racism; this is not desirable, but it's still not "systemic racism" in any meaningful sense. Thirdly, there are economies of scale to be had by participating in the majority culture, privileging those who've integrated over those who haven't--if you remove barriers to integration and some minority groups haven't integrated, they're at a disadvantage. Some might argue that this is systemic racism because the system privileges one group over another, but it's only related to race insofar as races tend to correlate with cultures, and also because it is a universal cultural reality completely divorced from any racist motive. Lastly, (by definition) different cultures make different decisions in different distributions--if some cultures make decisions that lead to poorer outcomes even if those cultures are the manifestation of historical oppression, it's still not systemic racism if all active forces of racism have been removed from the system.
Of course, all of this goes out the window if "the system" encompasses minority cultures and "racism" is allowed to mean "any disparity between races"; however, no one uses it in that sense, or at least every time a moderate or conservative brings up one of these "different choices -> different outcomes" possibilities, legions of university professors and other esteemed progressives shout them down, "no, it's systemic racism!" implying that "systemic racism" excludes cultures that choose their own disparities.
Of course, this whole semantic exploration is testament to the ambiguous nature of the term.