Which, despite being much younger and 80% made by one guy, is somehow way farther along than Servo. Ladybird doesn't have any pre-built images, but it's downright usable.
$ git log --format="%an %s" | grep -E "Browser|LibWeb|Ladybird|LibJS" | wc -l
15524
$ git log --format="%an %s" | grep -E "Browser|LibWeb|Ladybird|LibJS" | grep "Andreas Kling" | wc -l
4249
$ calc 4249/15524
~0.28530018036588508116