We have made some great progress on this idea and most of our services today do support move resources across groups.
We are still working towards 100% support and while we do that it would be great if you can help us prioritize the missing services.
Please file individual asks on each service category present in uservoice and vote for it.
Azure Portal Team
Thank you for your feedback. We’re considering this for a future release of Azure Search.
Azure Search Product TeamAnonymous commented
We need this for security and compliance - deleting the index and recreating it causes a scenario in production whereby the index may not always exist when a new document needs to be inserted into it.
At least with a delete all, it will delete all the existing documents and either create an exclusive lock to pause new inserts or allow inserts which are held in a separate transaction.