Short answer: a lot!
A summary of new features added between v2.4 and the current version is listed below, broken out by category.  If a help article exists for the feature, click the feature's link for more information.
Upgrades are free for all current Angelfish customers.
If upgrading to v2.4+ from a previous version, please read the 
Upgrade Notes article.
If you have questions, please open a support ticket!
New Reports
Reporting Features
Admin Features
Performance Features
- API Threading configurable within each Profile
 - Minimum TLS 1.2
 - New Processing Engine: agfdata (90% faster!)
 
Next Steps