Normally Chelsea has that long tradition of actually selling their coaches if they don't do well and example would be roman abramovich impatient on coaches with the club but since Roman abramovich was forced to sell this club, the new owner has been somehow lenient with coaches because I believe if it was abramovich by now porchettino case would have been something that isn't even worth discussing because I believe he would have sacked ever since so porchettino being sacked or resigning by himself isn't really the main issue as the issue currently now is for the new coach to be able to cope with the pressure that fans have left for that space in the club for the position of the Chelsea coach.
It seems like the newest Chelsea owner wants to change the character of Chelsea well, so if the Chelsea owner is soft on many coaches then this shows that Chelsea really hopes to get the right new coach who can bring Chelsea to victory in every match they face. It is a normal task for new coaches to adapt quickly and be able to provide good direction. Because what I know is that the coach will get respect and all instructions will be listened to properly when this coach can adapt well.