Interesting note from the Athletic article about Crosby's extension: the only holdup in the extension talks was Crosby wanting to take as much time as possible to decide what term and AAV he wanted. Crosby let the Penguins know his intention to re-sign right after the season and the Penguins made their offer in June (which was probably "2-4 years at any AAV you want"), and it was just Crosby taking all of the time he needed in the off-season to decide on the exact details he wanted.
Which aligns with why we heard literally nothing all off-season, it was literally just Crosby pondering it for months until he let the team know what he wanted. It's also a completely sharp contrast with how the Letang and Malkin negotiations were handled by Hextall.