Chrome had two benefits over IE that Ladybird doesn't have today. The first was budget, and the second was that IE development had basically stopped. By contra

Chrome had two benefits over IE that Ladybird doesn't have today. The first was budget, and the second was that IE development had basically stopped. By contrast Chrome today is perhaps Google's most active development team, and has more or less an unlimited budget. MS saw IE as a nice-to-have, Google sees Chrome as existential. Also, while IE was very closed source, Chromium (and Mozilla) are open. That means Ladybird is competing with Brave et al for mind share, and can't play the "we're better cause Open Source " card.