It sort of make sense for Nvidia's shareholders. The initial offering for ARM was only worth $38.5bn, which was already expensive due to SoftBank initial purchase price and not wanting for a loss. But at Nvidia's peak this deal was worth " $87bn ". For a company that makes less than $2B in revenue and at best ~$300M in Operating Income. Remember this isn't something you can buy and milk the crap out of other market p…
I feel Jensen and Nvidia still, very strongly, wanted to do the deal. The deal increased in value to $87bn only because NVDA's stock price increased that much. The real costs to Nvidia did not increase.
ARM is a legitimate competitor to x86, which Nvidia wanted to control.