Sadly, they have parted ways at this point. Not only has Ladybird broken off into an independent project but it does not consider SerenityOS a target platform anymore.
Ladybird is slowly shedding a lot of the “home grown” Serenity layers and replacing them with more mainstream alternatives.
As I am primarily a Linux user, I am excited to see Ladybird become a real alternative on Linux. However, as a fan of SerenityOS as well, I am sad to see all the energy and innovation that was going into Ladybird get stripped out of SerenityOS.
The goal with Ladybird is to be "independent" in the sense that nobody influences their decisions. However, they have no desire to be independent from a technology stand-point (other than being Open Source). In fact, they are talking about moving to Swift as their core language.
Wouldn't a hard fork Blink instead of LibWeb still achieve this goal?