Hello,
An article that I recently discovered that was published in February of 2018 by @"Carsten Czarski-Oracle" showcases the versatility of classic reports. I believe a lot of developers don't realize how much you can do with these templates to create a beautifully rendered report.
Here is the link to the very informative article entitled "That's a Classic Report? Really?":
https://blogs.oracle.com/apex/thats-a-classic-report-really
I hope you benefit from it as much as I have!
Aqua