Probably because there's a very low value in building message streaming framework once you've done the basics: how do you come to, say, a trading broker and say "your order management system could be just as fast with my other messaging framework".
He did it to learn and have fun, but finishing it to be prod-ready would require at least one user.
He did it to learn and have fun, but finishing it to be prod-ready would require at least one user.