Agreed, they still have a long road to travel before they are a true alternative to other browsers and engines. But I think it is good that there are genuine efforts in developing alternative browsers and engines.
Ladybird browser is even further away from a mature product, but also an example of a project I am glad to see existing.
I’m not sure if Ladybird is further away. Ladybird is seemingly targeting pretty relevant standard pieces and seems very far along in comparison from being a mature project.
I’m exclusively referring to my personal experience of playing with these. Ladybird can render (with errors) quite a few sites including Wikipedia where Servo fails catastrophically.