Maybe nothing? Many founders have no desire to stick around for an acquisition, and VMWare has a lot of competent people who would be eager to take over.
It's possible that's _why_ they sold to VMWare... they get to walk away rather than being stuck at a big company for 4 years vesting.
VMware acquires Bitnami - Ara Pulido and Erica Brescia quit.
What's wrong with VMware?