In 2008/2009, we had a manger resign on September 1st, saw the owner try to sell the club and fail, who then appointed a certifiable lunatic as manager, saw said lunatic nearly keel over and die to be replaced with somebody with no managerial experience whatsoever, who was then subsequently replaced with somebody with no managerial experience whatsoever. After all that, we would have stayed up if a stray ball didn't hit Damien Duff's arse and roll into the net.
It takes a lot to get relegated.
That said, current events do admittedly look like a promising first step for a new chain along those lines