Great thanks for the detailed responses, it will be helpful when planning our current upgrade.
One major roadblock I see in the future with 10.6 is the ability to upgrade. We have multiple Production clusters that would be reporting to a Master ETC.
Luckily this isn't a problem now with our current versioning, but how will we upgrade once 10.6 rolls around? It seems like the only potential upgrade paths would be to:
A. Upgrade all of the production clusters at the same time (We usually test out one and let it bake to make sure no problems surface)
B. Disable Enterprise Team Center until all Production clusters are upgraded.
Both options don't seem ideal. Hopefully the engineering team has a plan for this