The case that a demonstrably undemocratic nominee would have been confirmed- without senators agreeing to the Constitutional Option- is fanciful.
The so-called Constitutional option is a farce. Filibustering is just as constitutional as passing a Senate rule forbidding it is. They are both Constitutional options. There are other stories of nominees being delayed over a year because the Senate didn't like them. It's all legal, and it's all been done since the beginning. The feckless GOP is hoodwinking its own by pretending they are victims. They're not victims; they're frauds.