Yes, in fact, we are not only testing Holochain and Holo on physical nodes, we are already performing automated testing with scalable network clusters on Holochain and working towards the same for Holo.

As of August 2019 we have tested up to 75 nodes for Holochain and approximately 4 physical nodes for Holo. The networking and testing automations we described earlier are part of what will begin pushing these numbers up.