This question has come up a number of times in the past. However, there have been some updates that I personally was not aware of until last week. To cut to the chase, Horizon View 7 (all clone types) is supported with vSAN stretch cluster. This is good news. However, it is very important that customers should follow the Horizon View Reference Architecture (RA) design document and test the scalability of Horizon 7 and vSAN Stretched Clusters in their environment.