Do we? I mean, they did not handle last season the way smart/competent owners do, they handled it the way 80 something egotists do. And they have acted that way for some time. If Bob dropped dead tomorrow... maybe. But Kraft has spent a LOT of time over the last few years trying to burnish himself, his role, and his accumen in the public. He repeatedly went out on a limb about Mayo, and how his hiring, and long term future reflected Bob Kraft's genius. Nothing about Kraft strikes me as someone who is pulling the trigger quick on Mayo.
MAYBE if they lose every game from here out by 30+, even then I think he fires one or both coordinators. This isn't a random coach hire, and he doesn't have the offield issues of Meyer.
WIlks was an interim coach who was not retained. Yes the 49ers had back to back 1 and done coaches, but worth noting that was caused by the long-time GM forcing out the coach, internal promotion, fired, new hire, and then the Owner canning the GM and starting over. Possible I guess Kraft could do that, but it was an unusual situation and most point to it as evidence of a toxic organization.
Edit- forgot above... this isn't just a coach Kraft interviewed and hired. This is a guy he has a long personal relationship with that he identified (maybe before he'd even been an assistant coach for a game if you believe Kraft) as his choice to succeed Bill. Also... Kraft LOVES to brag about how few coaches he's had, how they were all great (because he thinks people will say "man that Hall of Fame Owner Bob Kraft really knows his football... maybe HE is the real reason they won those rings not Brady/Belichick).... football owners are all enormous egotists, firing a coach should be considered in terms of how it impacts them... Mayo is Kraft's guy, he staked his rep on him, guys like Kraft don't admit they were wrong about things like that until they have run out of other people to blame. Where if he was some guy that the GM hired.... go ahead and fire him, blame the GM, then make the NEXT coach your guy.