That entire article is an appeal to authority and doesn’t address classifying warranty repairs as goodwill. If the author wasn’t claiming to be working directly with a warranty accounting expert it would have nothing to say.

The article contains a large number of assertions and numbers derived from public records. Instead of a middle-brow dismissal, how about you attack something specific?

The author talked to an expert about a subject that few people understand, and this is portrayed as a bad thing? I guess it's better to speculate out of thin air?

Maybe you were an expert on warranty accounting before reading the article so you didn't learn anything. But I doubt it because if you were you would have had more concrete criticisms of the article. But even warranty accounting experts would probably appreciate the author working out the claims capacity ratios for almost a dozen different companies.

The article is obviously days of work from the author. It may be worthy of criticism. If so, please do so substantively.

Just a few of things I learned from the article:

- what warranty accounting is

- what warranty margins Tesla keeps

- how that compares to others in the industry

- what will happen to Tesla's financial statements in the future if Tesla adjusts their warranty margins closer to their industry peers

P.S. There's lots of good discussion about goodwill in the comments to the article.