It's pretty difficult to tell whether something is, or was at some point, a well known project. Things that were major 20 years ago but are no longer used tend to become invisible since search engines prioritize recent knowledge.
For example, I think young developers would not know that SOAP was a major, like really major, technology in the 2000's. If you google for SOAP now, you get "cleaning products" mostly, and if you're lucky a single mention of the protocol - but unless you dig deeper, it's hard to find out it was actually THE industry standard for web services at some point.
IMO it's exactly the same with Ant (I used Apache Ant a lot in my early days as a dev!! But I've seen how very few Java devs know it these days, it's one of those things only the older guys know, plus a few younger one who have an interest in build systems in general and their history).