> Speed in programming never matters except in the systems space. No one is gonna be able to tell Rust vs Go in a web API
Speed equals money. The same app running at twice the speed uses half the compute resources. You may also gain a lot of simplicity if you don't need to distribute your architecture so early on.
Don't believe the hype: moving from Go to Rust will not make your app (web or other) twice as fast! It might make your developers twice as slow though (as the author of the article noticed)...