Yeah well, I am trying to find out what works... :smileyhappy:
I do understand what "unsupported" means, but like VMware itself says, "unsupported" does not mean it will not work.
It just would be shame to put away a perfectly good server hardware, which is build to last years after years, just because the combined ESXi/Proliant officially supported lifecycle is so so short. In this server, the ESXi 6.0 has been running perfectly well in all testing, but before going to production will like to find out if 6.5 would run ok too.
Anyway, at the moment looks like 6.0 is the best option now, and luckily it is supporting Windows Server 2019 too.