@jamesb, the short answer is “no”, the behavior remains the same as before.
Here is the part where users might misunderstand - “Build & Run” associates the new code with all the devices within a model but ONLY restart the selected device so it downloads and runs the new code immediately. If you un-plug and plug (i.e. restart) another device in that same model, that device would also download and run the new code.
Our team is actually working on some changes to make this workflow clear and easier to understand. Stay tuned!