Linux is gaining ground on Windows rapidly and more governments are changing to this operating system. For example Russia will have all parts of it´s government, civil service, military and schools, universities change to Linux in the next 5 years. In Spain governments create special Linux editions for students, the same in Brazil and many other countries. It´s a silent revolution and the best file system for Linux is Ext4. Unless you rather see potential customers go to Paragon which already has had support for Ext4 for over a year, you better soon start supporting Ext4.