Hello folks, got a small question.

Let's imagine I create a PoW coin, there jump in 50 miners (so 50 nodes). What would happen if I want to update the code?

- Miners can refuse to update? (that would create a fork?)
- And what if my cryptocurrency updates automatically? would this be correct? why isn't bitcoin doing this? (to avoid that miners refuse the update, or even remove the reward for nodes that are outdated, could this work?)

Thanks!