Across the board Microsoft has over 500,000 VMs running Java at Microsoft.
https://www.microsoft.com/openjdk
https://www.zdnet.com/article/java-developers-microsofts-openjdk-build-is-now-generally-available/
ref - https://developers.slashdot.org/story/21/05/29/0532204/now-generally-available-microsofts-open-source-java-distribution-microsoft-build-of-openjdk