Just out of curiosity, is there any other modern system or service that anyone here can think of, where anyone in their right might would brag about migrating to it in less than a year?
It's a hard question to answer. Not all systems are equal in size, scope, and impact. K8s as a system is often the core of your infra, meaning everything running will be impacted. That coupled with their team constraints in the article make it sound like a year isn't awful.
One system I can think of off the top of my head is when Amazon moved away from Oracle to fully Amazon/OSS RDBMSs a while ago, but that was multi year I think. If they could have done it in less than a year, they'd definitely be bragging.
