A tl;dr for the https://en.wikipedia.org/wiki/T–V_distinction https://en.wikipedia.org/wiki/T–V_distinction is that in recent history we've switched from using

A tl;dr for the https://en.wikipedia.org/wiki/T–V_distinction https://en.wikipedia.org/wiki/T–V_distinction is that in recent history we've switched from using the distinction to promote antisymmetric relationships, to using it to promote symmetric ones.