Re: Can the '--set-upstream' option of branch be removed ?

Kaartic Sivaraam [off-list ref] writes:

Just to be sure, you mean "die() with a good message" when you say
"fail these requests, telling them that the former option no longer is
supported."

Yes.

It's pretty surprising it takes almost a decade to *stop accepting* a
bad option though many users are confused by it.

"It's easier to do things than to undo them!"

Yes, that is why we try to be extra cautious when adding new things.