I think what OP specifically meant is that it's a first they actually charge for a product like this, so your predicted outcome is less likely.

Diane is basically running the business now and the vision is fairly clear at his point. I doubt that will be happening for meet. Google is organizing itself around key verticals (websearch, cloud, media, office/collab, and devices). Meet is a key feature for their office suite.

This product is how Alphabet itself gets all its business done, so that seems unlikely. Could it be replaced with something similar in the longer term future, like the Hangouts -> Meet transition? Sure. But that transition was pretty easy since it was still the same accounts on both ends, which would be true of any future Meet transition as well.