People say a lot of things about Apple.

The 5s doesn’t get regular updates though. The previous update of iOS 12 was three years ago. So about ten years of support. I think that’s also more or less the duration for newer models.

OTOH, the 5c was released together with the 5s but only runs iOS 10, last update in 2017. So for the extra cheap models the story is a bit different.