Again, who's actually using it? All I see is Salesforce and two no name companies. It's supported by Netlify which is something, but I wouldn't say "hard hitting companies". Netflix and Amazon are hard hitting.
If it doesn't have a Wikipedia article, there's a very good chance it isn't very popular in the industry. At least in terms of open source standard technology, which this appears to be reaching for.
Google, Amazon, Tesla, Tencent, Alibaba, ByteDance are in the list, not all are on a website. It's not like a company mandate, mainly individual contributors checking it out and building things.
It's not widespread because it is just starting to get going, but it is definitely popular (well liked) among its users.
If it doesn't have a Wikipedia article, there's a very good chance it isn't very popular in the industry. At least in terms of open source standard technology, which this appears to be reaching for.