Thanks for your feedback! We are looking at it to evaluate if we address your feedback and when.
Thank you for your feedback. We are currently in public preview of immutable storage for Azure Blobs which will enable you to keep your data in a non-erasable and non-modifiable state for a configurable retention interval. Check out the blog post here for more details: https://azure.microsoft.com/en-us/blog/azure-immutable-blob-storage-now-in-public-preview/
For any further questions, or to discuss your specific scenario, send us an email at firstname.lastname@example.org.Micheal Kilpatric commented
As a partner, we see this requested repeatedly in Heath Care, Banking, and PCI compliant businesses. This would be a highly utilized feature, and can compete with AWS Glacier Vault Lock