Let’s be honest. When we talk about migrating a service to Rust, we all envision the same thing: liquid-lightning latency, CPU graphs dropping off a cliff, and a single server suddenly handling the traffic of a small European nation.
Momento spent over three years rewriting its services from Kotlin to Rust. They expected raw speed. What they actually got was a massive upgrade to their engineering sanity.
Here is what actually happens when you ditch the JVM for the crab emoji.
1. The Compiler is Your Aggressive Pair Programmer
In Kotlin, you swap an account_id and a user_id because they are both strings. Your IDE doesn't care. Your reviewer misses it. Production explodes at 2 AM.
