"On Tezos’ evolution, Breitman states, 'One of Tezos’ most salient aspects is that the protocol can evolve. One important consideration when designing a decentralized protocol is that it has to follow a set of rules. Some of these rules you don’t really want to touch, because people are not going to trust the system if the rules are changing arbitrarily, but some you might want to tune because they don’t overwhelmingly affect the semantic of the system: they mostly have to do with how well it works.

An example of the above could be the block size (which led to the Bitcoin Cash fork). The problem is how do you allow a system to upgrade itself without the need for this external coordination. That’s what Tezos tries to do.'"