Suppose you have currently a sps 2010 site and maybe you want to upgrade. What will you do upgrade ? or place it in the cloud ?
And you use the sps only for document archive and some team sites, currently you have the whole DTAP config and every rol is configured for high availability. The deployment is done by SCCM in the first place and using VMM 2012 with orchestrator to deploy a bigger farm if you need one.
but why all this if you can place this in azure let me hear your opinion and or when would you place it in the cloud and when not.
Azure would be cost-prohibitive to those running servers in their closet, to be honest.
DR is a secondary concern for them. Primary would just be having decent backups (which are often on USB drives that may or may not leave the building).
Doing DR with SharePoint, regardless of how you spin it up, is extremely expensive.