I did many test installations and the boot isn’t really necessary.
Surely it can solve some kind of situation, but the dc must work out-of-the-box after the installation, and all your tests are very valuable to us in finding all the bugs! 
I found only one issue on the DC: on a VM with a bridged interface, I can’t access the DC from other machines in the network. The same issue doesn’t apply on physical machine, so I would blame something in the network setup of my VMs.