Even if this sort of (obviously rare) attack is not a concern, it baffles me how few otherwise-intelligent people fail to see the way these updaters provide the network (which itself is always listening, see Room 641A and friends) with a fingerprint of your specific computer and a way to track its physical location based on the set of software you have installed, all of which want to check for updates every goddamn day.
Threat modeling: it keeps things realistic.
I once worked at a company where the Security team were very proud of this and all the other tricks they used to catch leakers by figuring out who was on campus, where, at what time, usually via fingerprinting personal devices carried alongside corporate devices.
And these updaters almost universally use HTTPS, which network-based adversaries can't see except for SNI, and even that's going away...?