Chelsea will always attract top managers. We have been chopping and changing managers for 20 years. This isn't new. Managers still fall over themselves for a chance to manage Chelsea, unless his name is Pep.
It's obviously not Chelsea because there's something uniquely special about Chelsea that is the reason for this - it's because we are apart of a small group of a clubs at the top of European football who can offer talented players, spending money in the window and a reasonable chance to win trophies plus they get a huge pay off if it doesn't work out.
As long as that remains true, most top managers will be interested in coming to Chelsea. Nagelsmann for example, would be in high demand if he waits until the summer when the PSG and Real Madrid jobs become available, but he's currently putting a lot of effort into convincing Chelsea to pick him.