Discussed in a few small past threads:

Noria: Dynamic, partially-stateful data-flow for high-perf web applications - https://news.ycombinator.com/item?id=29615085 - Dec 2021 (10 comments)

Noria: dynamic, partially-stateful data-flow for high-performance web apps - https://news.ycombinator.com/item?id=18330477 - Oct 2018 (1 comment)

Noria: dynamic, partially-stateful data-flow for high-performance web apps - https://news.ycombinator.com/item?id=18176135 - Oct 2018 (1 comment)