If Breyer retires in 2023 or earlier, the maneuvering of the Senate GOP is going to depend on the ideological bent/qualifications of whoever Biden nominates. It would be dumb for McConnell to commit to allowing a vote on a nominee before we have any idea who it is.
"It would be dumb for McConnell to commit to democracy."
The constitutional role of the Senate is to confirm the president's nominees, including those for the Supreme Court. Biden is not entitled to have a nominee seated/considered absent 50 affirmative votes in the Senate.
That is literally what "democracy" is in this case, lol