> Example: when you add a new element to the API response, the recipient needs to update their schema. That's not the case with protobufs. The sender can add n

> Example: when you add a new element to the API response, the recipient needs to update their schema. That's not the case with protobufs. The sender can add new fields, and they will simply be invisible to receivers using the previous version of the message. You'd need to update the receiver only if you want it to access the new fields, which is what you'd need to regardless of serialization format.