I invite you all to a brief mental exercise.
Filemaker recently announced Filemaker Cloud in a "joint-venture" with AWS.
FileMaker once supported Linux (many many years ago if I'm not wrong), but currently it's known to support only macOS (Mac OS X), Windows and iOS, but Filemaker Cloud runs over CentOS Linux in AWS Cloud...
So why isn't there a Filemaker version for Linux ?
For several months I have a FileMaker 15 server hosted on AWS EC2 vm (necessarily running in top of Windows, because AWS only supports Windows and Linux as guest OSes).
Wouldn't it be great to have Filemaker Server running on Linux as it does support CentOS ?
What am I missing here ? Why should you care ? Linux is a free operating system, not requiring licensing... which is one less cost in the AWS / Filemaker Cloud equation.