After the ESR and ID of PI 7.3 are integrated in Eclipse, SAP started to merge the ABAP IDE to Eclipse.

The new ABAP IDE based on Eclipse targets to significantly increase the Developer Productivity by offering features which are essential for modern development tools like  

• High-performance stable, online development in several ABAP backend systems (even of different releases)

• Display/Edit of multiple ABAP objects in parallel

• Highly Customizable UI

• Efficient Source Code Editing

• Refactoring Support

• Fast Search and Navigation Capabilities

• Test-Driven Development

• Integrated Quality and Troubleshooting Tools

• On-the-Fly User Assistance

• …. and more.

With complex feeling, I had to say it's wonderful.