Wouldn't you automatically know - by default? Seems like all cars, computers, phones etc give you notice of said goings on. .
There were, most likely, smaller updates as there was a bug on my car, and it fixed itself in two or three days - some connection issue. Predictive driving seems to be getting a lot better at predicting breaking on crossroads ... but that might be simply the system learning.
I don't take delivery of mine for a month or so, I'm just curious if they're updating or adding things since launch.
Are OTA updates tied to the Toyota Connect or another subscription service, or are they included somehow?