A Dedicated Host contains EC2 instances. You would still use EBS if you need storage other that what's available on the instances.

Per the EC2 Instance Types page (https://aws.amazon.com/ec2/instance-types/), many of the instance types already include SSD storage.

Thanks Jeff for the response. Appreciate that you personally respond.

Wouldn't dedicated I/O be a big plus and selling point for dedicated instances?