I found a well hidden section on the Sage website that outlines all of the enhancements that has occurred with every release going all the way back to version 3.50 (circa 1997)
I turned this section into a PDF document that you can take with you.  It goes all the way up to the brand new Version 4.40 release that you will be receiving this week if you are current on maintenance.
You can download it HERE.
Sage MAS 90 and MAS 200 Chronicle of Enhancement Releases