Filemaker may be a decent product for small business or Mac users, but as far as supportability, scalability and reliability go, it is a far, far cry from MS SQL on Windows, or even Oracle on Windows (Oracle on Unix or Linux would be more reliable and scalable than Oracle on Windows, which is buggy, and often poorly ported). I, and all of my colleagues whom with I have discussed Filemaker, and who have supported and designed database implementations with thousands of GB of data and thousands of concurrent users (including me), universally panned this product. In my experience with a few implementations, the reliability and scalability are shameful, and Access on a server performed better.
On their website, Filemaker compares their product with Access, and their server product supports "up to 100 simultaneous users". It isn't even an advanced DB, much less does it have a robust BI package, if it has one at all.
Businesses generally choose MS SQL or Oracle, and there are plenty of good reasons, mainly that:
a) budget is generally available and they can spend money on projects or processes which are important to them
b) efficiency, scalability and stability are usually requirements.
Hopefully some of the good IT practices used in business will migrate over time into other industries, such as academia, non-profits, health care, and public sector.