Hi Antonio,
Short answer is yes. You can move to data store deployment regardless of your non-data components are virtual or hardware. Only limitation here you must have all VM or all HW data nodes, you cannot mix and match - only for the data nodes-...
Hi,
If rest of deployment on 7.4 and you are replacing one component, you can consider reinstalling as well. Please note, you wont be able to use backup from a different version as mentioned above, so this is only feasible if you don't need to deploy...
