Good news for everyone who is using Azure DevOps; Microsoft is simplifying the licensing model. Most information about it can be found here; https://devblogs.microsoft.com/devops/a-simpler-way-to-buy-azure-devops/.
I want to point out one change specifically as this was a show stopper for most of my customers who wanted to use Azure Artifacts:
For cloud-hosted Azure Artifacts, users will no longer need an Azure Artifacts extension license. Instead, users will only pay for what they store in Azure Artifacts. The first 2 GB are free, then prices range from $2 to $0.25 per GB per month, depending on the storage consumed.
Users with a Basic license will now be able to use Azure Artifacts on-premises without needing to purchase an Azure Artifacts extension. This means with Azure DevOps Server 2019 (formerly Team Foundation Server), users with a Basic License can create and consume Azure Artifacts on-premises if they have a Basic license assigned. Please note that for previous versions of our server product, an Azure Artifacts extension is still needed to access this functionality.
This means that you no longer need a separate license to start using Azure Artifacts which probably will increase adoption.