Is There a Way to Degrade the API?

The biggest advantage for me personally is that for like any kind of like people who come new to the project, like especially if you have multiple clients and you have a public API, you can just stay with the latest version. So you don't have to teach them about a whole bunch of potential endpoints. You can then also still more gracefully degrade the API for all the clients. And now maybe give a response back or give some information about a key.