I found out about SerenityOS because of the post about Ladybird here on HN a few weeks back.
I have since watched hours of his stream and found it super inspiring. To the extend that I now want to learn some C++ and make some contributions to the project.
It's really refreshing to see people code for fun and build whatever they feel like.
I think a lot of profesional devs lose that when they go all in on their work (which is understandable) so it's awesome to see something like this!
Congrats on the 4 years! Looking forward to what's next!