To date fifty custom reports have been published, leading to around 2500 downloads. Some of these custom reports are not custom anymore and are GA in SRM (like SRM Health, Datastore utilization, Storage Pool Capacity Planning, etc.).
SRM reports cloud enters a new phase and goes to GitHub at : https://github.com/coulof/srmreports !
I hope to see a pull request once in a while ;-)
On a sidenote, the founders of Watch4net (i.e. the base-architecture of Dell EMC SRM) launched a product that has a connector to SRM, you can check it out here : https://www.unryo.com/watch4net.