My problem with that theme is that it doesn’t highlight any buttons. I believe all buttons should have borders, especially the ones the titlebar. This helps distinguish a noninteractive label from an interactive clickable button.

This survey doesn’t distinguish between levels of cloud service provider, so I was a little confused.

Virtual private servers, cloud virtual servers (like AWS), cloud-based software where you provide code or a program and the cloud system runs it on a server of its choosing, and cloud-based systems where someone else provides the software (like Google Docs).