This does actually ring a bell for me - I seem to remember mention of it very early in the century. That perhaps cuts to the heart of the issue: it's been going as a project since 1996, yet it's still only considered alpha. In other words, I'm not so sure it's going anywhere fast, and I'm not sure what you'd really use it for.
ReactOS is a usable Windows NT 6+ clone, with kernel ABI ( driver ) compat, that runs real software. What are you comparing it to, to be able to qualify the speed of its development?
Don't be sure about something in the tech on such a long time frame. Just to put things into context. Andoird is less than 10 years old and already close to windows market share territory. Facebook is only 14 years old.
I can't even imagine to comprehend what will happen 20 years from now.
JQuery is 11 years old now. ReactOS is a goal and nothing more. Nobody is using it right now because it's barely usable outside of a VM, and even then it's software compatibility is smaller than WINE, let alone Windows.
ReactOS is a cool project, but your comments are bordering on delusional.
10 years ago there were 0. The churn in JS code is just too high.