One of my clients had a few reports running in Data Warehouse and when we went to look for them yesterday they were completely missing. It seems like they disappeared after this new UI test was rolled out.
is this a bug or should we expect them to be gone for good?
That is a really good question.. I haven't gotten the UI rollout yet, but if existing exports are missing that isn't good....
Have you contacted Client Care?
I just got the new Data Warehouse UI and similar to you almost all historical records were gone and only a few records from my colleagues remained without knowing the reason or logic.
A disappointment and problem is that there is no filtering option "Other Filters" -> "Show all" under the new Data Warehouse UI. It is an issue for admins like me to not be able to see data warehouse requests for other users and to provide troubleshooting or support.