I'm fairly excited about Ladybird because it's already gotten 423 on html5test vs Firefox 128's 544. I do agree that they're currently pretty much alpha quality, though.
Additionally, it's pretty ironic that Musk is picking a bone with the International Development Finance Corporation, because it was his buddy-slash-father-figure Donald Trump that created it.
most defunct / unmaintained and the three: blink, gecko and webkit being the only ones actively developed and maintained today (I am aware of Goanna, but some articles online say it isn’t being developed anymore – I could be wrong).
The fourth most developed browser engine is Ladybird, spun off from the SerenityOS project. It's very active. And then you have Mozilla's Servo... kinda. And then Goanna is still maintained, but not too active.
Copyright only prevents you from copying code, not copying the design. Patents are meant to protect design. I also agree that software patents shouldn't go beyond normal patents or protect overgeneralized stuff with prior art.
So, in my opinion, it's been pretty much the same kind of pace.