> AFAIK Azure/Google have actual partnerships with the Elastic stack, partnerships that assumedly benefit both sides and have staying power.

Can you elaborate a bit here? We deploy from elastic.co into AWS and it seems to be fully supported. I'm not sure what they'd be doing with Google Cloud/Azure that they're not doing with AWS. Their homepage seems to still equate them all "Run where and how you want. Deploy on Google Cloud, Microsoft Azure, and Amazon Web Services with Elastic Cloud."