The best platforms are those that build a single product. Then we can argue for days about whether it's the platform teams responsibility to do X or the product engineering teams responsibility.

In close second are the platforms that are used for a fraction of a product and will never be wholely migrated onto because they are not fit for purpose.

Third place goes to the platforms that never actually have any product built on top of them - a theme so exciting people love recreating it at there own workplace.

We're all just temporarily embarrassed Linus Torvalds that want the world to build on our apis.