Google Assistant is going away, to be replaced by - checks notes - Google Assistant by a different name.
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Tangentially related, does anyone know any FOSS (local preferred, but self hosted if required for performance) assistant apps? After switching to GrapheneOS I do miss Bixby (say what you want about it, but creating reminders/alarms by merely holding down a button and using natural speech was quite handy).
Home Assistant [1] can be a voice assistant (both on phone and on dedicated devices). It's FOSS and can be fully local [2]. It's really gear towards home automation though, so its suitability depends on what you want to do with an assistant
[1] https://www.home-assistant.io/
[2] Although frankly to have a fast-enough and good-enough LLM you might need to use a service