The wiki explicitly mension the typical sans disadvantage: "One potential source of confusion in Calibri is a visible homoglyph, a pair of easily confused characters: the lowercase letter L and the uppercase letter i (l and I) of the Latin script are effectively indistinguishable."

So while I prefer Calibri as TNR has been the default for longer and hence is more boring to me, I can understand people might prefer a serif font for readability.