It isn't, but in twenty years getting paid to write software I have far more regrets where I rewrote and shouldn't have, than where I should have rewritten and didn't.

If you're Google and you have people with these abilities kicking about, it's probably not a crazy investment to see what happens. We've got a HN story elsewhere in the list on post-quantum key agreement experiments in Chrome, again there's a fair chance this ends up going nowhere but if I was Google if throw a few resources at this just in case.

But on the whole I expect Fuchsia to quietly get deprecated while Linux lives on, even if there's lots to like about Fuchsia.