Probably because development was already well under way several months ago.

But I agree, explicit support for OpenTF here would have been really nice to see, even if it delayed launch a little.

Hashicorp is still not out of the woods. If Microsoft or AWS gets behind openTF they are fucked.

Google has a history of welcoming the product on their platform without taking ownership or responsibility for maintaining it. It does the same thing with Elastic, Confluent, and Redis. I’m guessing Hashicorp is deploying infrastructure on Google cloud on the customers’ behalf. It’s not costing Google anything because they’re not reselling it. AWS does something similar with it’s Marketplace, but customers prefer the AWS full-service product rather than adding it to their environment by network peering or deploying templates in their account.