Folks need to look beyond the “Does this meaningfully help Biden” and “Meh I never liked the McCains” aspect of this to what this signals. The GOP, as hard conservative and reactionary as it’s been since the late 70’s, isn’t even that party anymore, the party of Reagan, Bush I or even Bush II.
Today’s GOP is effectively the party of morons, racists, misogynists, nativists, lunatics, fanatics, zealots, fascists, radical libertarians and greedy assholes, but WITHOUT being balanced out by more moderate and conventionally conservative types. The latter still exist, but they have little voice within the party, and many are leaving it, if not to become Dems, then to become indies and often vote Dem.
The GOP leadership knows this, and is ok with it, so long as it and not the loonies, idiots and trash are in control and able to manipulate and harness this human flotsam and jetsam. And even with all that, it remains a minority party demographically, that can only stay in power via cheating, lying, criminality, and certain peculiarities of our political system that favor it, like the senate and electoral college.
If we can’t do something with this to gain and keep power, we don’t deserve to be in power. Instead of taking potshots or complaining about how unfair things are, why don’t we figure out how to game all this to our favor, and change these peculiarities to be fairer, and then do so?