I think the point was about the frequency of switching your frontend. With a proper frontend you can switch the backend on each request if you want, but usually people will stay with one main-interface of their choice. For AI, OpenClaw, Moltic, Rowboat are now such a frontend, but not many will use them all at once.

It's similar to how people usually only use one preferred browser, editor, shell, OS.

Are there any with a credible approach to security, privacy and prompt injections?