And that also would be why they are shutting it down. Google internal services are always being rewritten, and code migrated from the old version of the servic

And that also would be why they are shutting it down. Google internal services are always being rewritten, and code migrated from the old version of the service to the new one. If nobody is willing to migrate an externally visible product, it has to sunset at the same time that the internal service does. This philosophy does wonders for internal code quality and consistency. It also makes people outside the company wonder whether they should trust Google's public offerings.