What today is underlining more than anything else is the difference between a rich club and a club with rich owners
For a couple of obvious examples of a rich club, look at Man Utd or Liverpool who have always had plenty sloshing around the coffers so they have always had liquidity even if they miss out on the CL for a season or two, so if their owners got sanctioned for whatever reason it wouldn't be instantaneous financial armageddon for them
On the other hand there's clubs with rich owners where the owner might have liquidity but the club certainly don't, which is certainly where Chelsea, The Sheikh Mansour Team and Everton fall and that's where a couple of poor seasons, sanctions, the owner falling gravely ill or even mere hubris on the owner's part could scupper the club long-term, and this is why the balancing act is needed
For the best example of that, did you know that Barnsley's owners are worth $9.1bn? Now let's put that figure into context
Chelsea's owners - $14.6bn
Man Utd's owners - $4.7bn
Liverpool's owners - $3.6bn
Leicester's owners - $2.15bn
Long story short, Barnsley's owners are worth two, three or four times what the owners of those clubs are worth, or to put it another way 2/3 of what Abramovich is worth, and yet they're not spending insanely because they are aware that, while the club's owners are rich, if they bet big on promotion and fail to get it, the club's future will look something like this
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And that is the difference between a rich club and rich owners. A rich club can have a couple of bad seasons and still maintain financial stability, while a club with rich owners are existing on a life support machine and the question is what happens if the plug is pulled, because while there are examples of somebody plugging the machine back in (i.e. The Sheikh Mansour Team swapping their Thai criminal for an Emirati one) there's several examples of the machine not being plugged in such as Leeds, Malaga, Parma, Dnipro, or Gretna