Free esxi is pretty crippled at this point, esp for high core counts. Proxmox is the way to go!
Asking because although their website says its OSS it's super unclear what to download for homelab use.
If they're seriously wanting people to pay $$$ even to run it on old homelab gear, that's not going to work (for me). ;)
Fuck that. They can go and fuck themselves sideways instead. :(