Obi Wan is worried about excessive optimism.
He's right to be concerned. Jerry Ford had a huge amount of momentum in the closing days of the 1976 campaign, so much so that Time Magazine had to prepare two covers for the post-election issue, one for each presidential candidate. But not enough. The result was Jimmy Carter and Carter's legacies in Iran and North Korea.
So sign up for the GOTV effort. It is easy, effective and could well make the difference in many close races.