In an email from Adobe, they said "While we have been reducing our investment in XD, we will continue to support it." which means Figma has won. XD will be killed once people have switched to Figma. They didn't pay $20 billion to kill an app that's used by more people than XD.
Kill Figma as a competitor company, not as a product. Same reason Facebook Messenger still exists even though Meta similarly bought Whatsapp defensively.
Why would they even want that? They paid 15% of their market cap (30 considering the drop) for a new shiny toy, and now they would just… cash it?
Doesn't make any sense, their incentive is to keep it great and working.
Whether they can is a completely different matter.