From an analysis ran by Russell D.:
According to some quick lighthouse audits, the new site seems to have improved significantly. Performance saw a > ~100% improvement, SEO saw a ~25% improvement, and best practices improved by ~19%. Check below for the numbers and attached docs for the audit details.
I ran lighthouse from google chrome devtools on the wayback machine versions of the new site and the old site (last snapshotted on aug 19) a few times to check for myself..
Lighthouse audit using wayback machine on new site -http://web.archive.org/web/20191001033116/https://mxnet.apache.org/
Scores: 86, 71, 87, 86
Lighthouse audit using wayback machine on old site -http://web.archive.org/web/20190818173811/https://mxnet.apache.org/
Scores: 24, 30, 24, 28
Lighthouse audit accessing new site directly (to see the impact of wayback machine on the scores) -https://mxnet.apache.org/
Scores: 99, 99, 99, 98
Note that these scores are only for performance, but there was a significant uptick in best practices(increase of ~6-15 points) and SEO(~23 points). Accessibility is roughly the same, at ~80 points, which wasn’t bad to start with.
Though this is a small sample size, when we look at the difference in scores between wayback+newsite and the new site directly, it seems like the wayback machine has an impact of roughly ~16 performance points.