Given that the question was which match Chris wishes she could replay, I'm not that surprised she mentioned the Wade Wimbledon semi. It was one of those occasions that I think Chris took the result for granted.
As the #1 seed and defending champion, I think she felt Billie Jean and Martina were her biggest obstacles tot he title. evert met King in the QF. It was King's first singles appearance at Wimbledon since she dethroned Evert in 1975, having "retired" from singles competition after winning the title in 1975. Chris was very keyed up to play and beat Billie Jean that year. With the confidence of a second Wimbledon title, more years at #1, and the fact that Billie Jean was still on the comeback trail, she knew she should Billie. And she did, comprehensively, 6-1,6-2! With Martina losing to Betty Stove in the QF, Chris thought it was a foregone conclusion she would win the title. And she had a letdown vs. Our Ginny in the SF.
I read comments from Chris that she admitted to the letdown, and that she was a bit stung by the crowd reaction - against her - and it impacted her. That was a rare occurrence for Chris, to let the crowd or outside factors affect her play and the result of the match. It's true that Chris owned Virginia during their career. But one detail Chris forgot about was that in June of 1977, Virginia had split their previous 4 matches. Wade crushed Evert 6-2,6-2 indoors in London in November 1976. And Virginia also beat Chris in straight sets in the 1977 VS of San Francisco, semifinals. Virginia was coming into her own as a player, and actually at her most consistent and peak form heading into Wimbledon. (Virginia's chief Wimbledon nemesis Evonne Goolagong missed that year due to giving birth, and I believe that contributed to Virginia's confident mood that year.) While Virginia tended to fold often at Wimbledon under the enormous weight of expectations, Chris should not have underestimated Wade.
Two other factors influenced the 1977 Wimbledon semi between Evert and Wade. One was the 3R match between Evert and Tracy Austin, their first ever meeting. As soon as the draw was announced, Evert admitted she was nervous for that match. A big mistake for her, not only to be nervous, but to admit it. She won the match, but wasted too much emotional energy on what was a relatively easy 3R win. Chris played very patchy in her next match against Greer Stevens, struggling to win 8-6,8-6. And as I mentioned previously, the QF with Billie Jean was the one Chris really got up for her. Chris simply had a letdown - something rare for her - in the SF. Which is why I am sure she regrets having the letdown and losing out on an opportunity for another Wimbledon title. And while I don't think Betty would have beaten Chris in the finals, don't forget that 2 years prior, in the QF, when Stove wasn't playing at as high a level or with as much confidence as she was in 1977, she nearly beat Chris on the grass at Wimbledon, barely losing 5-7,7-5,7-5. Betty also pushed Chris in their US Open semi on clay a few months after Wimbledon in 1977, so I don't think a Chris over Betty in the Wimbledon final would have been an absolute forgeone conclusion either.
1977 was also the Wimbledon centenary, and Queen Elizabeth's jubilee, so there was a lot of celebration and British sentiment that year. I think Chris may have been a bit sidetracked by that, and was all a part of why she lost a match she could have won, especially since she rallied from losing the first set rather easily. But if you watch that match, it's evident that Chris was nervous from the start, and was simply outplayed, even from the baseline, by Miss Wade. I know it still stings Chris, but it did happen on very rare occasions.
PS - if Chris was "loudly silent" when 1977 was referred to as 'Virginia Wade's Wimbledon', she should have been. Because it WAS Wade's Wimbledon, not Evert's. Chris may still be bitter, and could point to her gazillion romps over Our Ginny. But she didn't do it in 1977, and there is no sense in being bitter about it now. If anything, Chris should be bitter about losing the 1979 and 1984 US Open finals. She should have won both of those matches.