[motorest]

> I never understood this meme.

If you don't understand how and why and when eventual consistency is a problem, you will never understand why cache invalidation is hard.

By the sound of your example, you only handle scenarios where naive approaches to cache invalidation serve your needs, and you don't even have to deal with problems caused by spikes to origin servers. That's perfectly fine.

Others do. They understand the meme. You can too if you invest a fee minutes reading up on the topic.