My guess is Data Bricks saw the popularity of Iceberg and realized that they were starting to look a little irrelevant still trying to promote their competing Delta Lake format. Have an Iceberg lakehouse? Well then Databricks just didn't seem very relevant to you. With their purchase of Tabular they're given some legitimacy when they start marketing their products as being iceberg compatible. This doesn't signal to me that Iceberg is going to be harmed in the near or medium term.