Fuchsia is dead sadly

It's very alive. It's being used for Google Nest hub devices. Through for HN that might as well it being dead, it seems.

“Rumors of my death are greatly exaggerated”

Google folks pop up here and there and say it’s actively worked on. Unless you have more recent information, I believe the project is still alive.

I thought it was the opposite and that it would replace Linux for Google products

Citation needed? I don’t disbelieve you but I haven’t seen anything concrete.

web technologies are not built to build Interfaces with them. I see a lot of US-Defaultism in that article too.

how good is it compared to the non-light version for only ad blocking?

It has a preset few lists in the extension, and you can only adjust a slider to determine blocking level, with the default just being DeclarativeWebRequest (non-blocking) ad domain blocking, and the higher tiers I suppose blocking dynamic content on the page like usual. No custom filters.

When it was announced I used it for a while and I seem to remember that the lack of cosmetic filtering was the only thing I really noticed.

imho modern code is in general no very readable a lot of the time.