Hardware Requirements for Hybrid Cloud Observability vs Current 2022.2 installation

When looking at converting to Hybrid Cloud Observability and comparing it to our current configuration. I have been told the amount of devices/elements increases per poller substantially. 

If this is true is it possible to decrease the number of needed additional pollers based on the increased in efficiency?   

Is there somewhere we can see the changes in poller capacity with Hybrid Cloud Observability?