Новость уже месячной давности, однако на RSDN вроде ещё не публиковали:
VMware ESXi 8.0 Update 3e Release Notes

Broadcom makes available the VMware vSphere Hypervisor version 8, an entry-level hypervisor. No Broadcom support is available for this offering and it is for non-production use.
vSphere Hypervisor cannot connect to vCenter and therefore cannot be centrally managed. You can remotely manage individual vSphere Hypervisor hosts by using the VMware Host Client.
vSphere Hypervisor supports a maximum of 8 virtual CPUs per virtual machine. You can download it free of charge from the Broadcom Support portal.

Обсуждение на reddit.
Пишут, что ключ уже "зашит" в iso образ, т.е. отдельно получать не нужно.