Async Rust rewards explicit ownership of tasks. Spawning without joining is a common source of silent failures.
The video covers JoinSet-style structured concurrency, select with bias awareness, and when blocking pools are the right escape hatch.
Why it matters: many services look fine in demos and then stall under cancellation or partial outages.
Tools mentioned: Tokio, tracing for span-based diagnostics, and tower middleware for timeouts.
Apply this by auditing every spawn site for a clear owner and a cancellation path before your next load test.