You are assuming all clients are equal. And would be forcing your newer clients to keep an older set of rules. If you were releasing all the client models in a short time span, yes, it would be stupid, but why would you shackle a model released in 2015 with rules setup 10 years ago? What I meant was we are not talking generic disk storage here. We are talking about specialty systems that do a select set of tasks. I was throwing a Windows farm out there as a generic term for plain old data serving. Anyway, this is way off topic.