they had an interim CEO: why exactly do they need a new interim CEO? it's been a couple of weekend days, zero business days. Not taking sides, none of this makes any sense, so much drama.
hypothesis: there's too much money on the table, and inasmuch as some people care more about the public welfare than money, too much of that too (meaning, a lot of money in something usually means it's something important, something of value, and therefore not all bad; so this is all just people trying to steer things the way they want them to go rather than the way other people want them to go)
By selecting Shear as the new interim CEO, the board signaled they weren't interested in Altman coming back.