#2 The past still trumps the present
It's something that WWE has done for years, and 2020 has been no different. Ricochet fell to Brock Lesnar, although that was the expected outcome. The WWE Championship match was essentially a placeholder for the Beast until he tangles with Drew McIntyre in April.
The Undertaker showed up to fill in as a last-minute replacement in the gauntlet match where he pinned AJ Styles. Styles is no spring chicken but he is a representative of the current crop of Superstars.
Even in the SmackDown Tag Team title match, a team from the past that has reformed, The Miz and John Morrison, defeated a team from today's WWE. It made sense in storyline because the New Day has been opposed by Miz and Morrison since the latter's return to WWE. It wasn't something that just popped up on the go-home episode of SmackDown.
The biggest example of the past beating the present was in the Universal Championship match. Goldberg returned two weeks ago to challenge the Fiend Bray Wyatt for the title and he captured it in the main event. It altered the path for several stars at WrestleMania but still followed WWE's choice of having part-time stars go over full-time performers. It all boils down to what they perceive as the biggest matches possible for the Show of Shows.