This is historic, actually

who cares

I guess people who aren’t ignorant of the significance.

You, enough to comment.

Pretty much everyone else who clicked the link here. Why bother commenting on something you don’t care about? A Beatle playing on a Stones track is very significant to a lot of people

Your mom.

I do, here's one of many downvotes to come

my mom is excited by this, you are correct

Now watch Mick walk into the studio with Lars Ulrich energy and demand the bass track be turned way down in the final mix