It was absurd how early Arizona was called given how close the final margin was and how uncertain the ballots were to predict later on. If you look on YouTube at interviews the Fox guys gave on election night they basically were saying Biden was going to easily win, it would narrow but nowhere near what Trump needed. That was all wrong and demonstrates that their call was premature, even if it was ultimately right. IIRC they took a lot longer to call Minnesota which ended up not even being close.
I think what's often overlooked is that Fox and the AP were using a different set of data than the other networks. They were looking at the full precinct reporting for Arizona, and doubled, tripled and quadrupled down on their call when asked if they would retract it as it kept coming in because they figured there wasn't enough heavily Republican precincts in Maricopa left to flip it. The other networks were just looking at county results. So while it might've seemed bold, there was a science behind it.
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