https://channel9.msdn.com/Shows/Azure-Friday/Azure-Cosmos-DB-update-for-August-2019

Azure Cosmos DB is getting more and more powerful. Now Apache Spark can be enabled. It comes with Jupyter Notebooks. You can work directly on the data. So there is no need to copy the data around. Spark worker can be auto-scaled up and down with your DB. Aggregation query performance improvement is fantastic, both faster and cost less.