Here's another BI-type analysis tool that's probably used by more people than any other BI tool in the world. It's cloud based, it provides incredibly detailed and useful information for performance analysis and identifying areas of improvement. Here's a sample report:
I think you should be able to see that without being logged in or anything. Let me know if you can't and I'll find a public report.
My point is, this is mainstream BI. This is actually useful business intelligence methodology being used to do real analysis by average people.
And if you're wondering...
Yes that's my guild
Yes I was the top healer :).