For some companies, the migration from oracle to anything else would cost too much and hard to justify in some places, especially government. It's the same for VMware, It will takes many years for some government agencies to replace it with something else.
I'm guessing Broadcom is going the same way. They can't compete against cloud migrations or open source alternatives.
So as you said, they're squeezing locked in customers, the fastest they can until they've all migrated... Or until some decided that keeping it at that price was still a better ROI than migrating.
I don't think a lot of people will start a new VMware data center in the years to come.
And then at the next renewal, when the price goes up 3x, the cost of a one-time migration will look cheap - to the new executive that's in charge at that time.