The Theory of the Unitary Executive
which gained traction in the Nixon WH and the various deadenders from there who have been embedded around since, probably made a tiny (if constitutionally dubious) bit of sense during the Cold War, when at least ostensibly there was constant threat requiring immediate executive action.
Like the fact that we are turning Chinese (after turning Japanese in the neoliberal moment) is an unfortunate manifestation of the old "choose your enemies well, because you'll come to resemble them."
But once resurrected under the extremely thin auspices of 9/11, it was inevitable that the moment where we'd have to choose strong man rule vs. a constitutional Republic was coming.
I don't expect the threat to subside entirely with the inauguration of Biden.