Comment by chroma

That's one person claiming an update bricked their car, but it's unclear if that was due to a bad software update or a hardware failure that coincided with the update. Tesla usually explains what they fixed, so it's odd that the poster never replied with more details.

Even if every software update was perfect, you would see individual stories like the one you linked to. There are millions of Teslas in the world, and they all get updates frequently, so a hardware failure will sometimes coincide with a software update. If a bad update were shipped to customers, it would be a story similar to this Jeep issue: thousands of cars affected at once, lots of furious customers, and news articles about the failure.