I completely agree with your point and I think saying that R is keeping compatibility with S doesn’t make much sense. R is keeping compatibility with R, as it s

I completely agree with your point and I think saying that R is keeping compatibility with S doesn’t make much sense. R is keeping compatibility with R, as it should. Maybe I lack context, but those tweets looked to me as if someone said “I can run this four year old game in the latest release of Windows!” or “Three versions of Office later I can still open my excel files!”