Why do you need DMO/SMO in the first place?

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>An app with a VFP front/middle and a Sql back-end, would you use Sql-DMO or SMO objects to control database tasks and would you use RMO for replication? I ask because I see DMO will go away. Just wondering if anyone is using SMO and RMO from a VFP app?
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>Pros - Cons?