I didn't expect to see this here yet. We opened up the repo because we ran out of private CI usage. A blog post is coming next week :). Happy to answer questions here though.
One thing to keep in mind, the main reason for Topcoat to exist is that many organizations are already using Rust for infrastructure-level or performance sensitive reasons and often just want to build a web app using the programming language they already use.
I'll say that first code snippet is a fantastic TLDR.
Great initiative from the folks at tokio. How does it aim to be different from loco.rs https://github.com/loco-rs/loco?