One of main areas that the tool can improve is performance. As with any tool, there are some use cases for which improvements would be welcome.

The background scanning of projects should be optimized after starting NetBeans. When a lot of projects are opened, it takes a little too long for NetBeans to start up. I experienced this with more than 30 projects open. However, after loading projects, everything works normally.

In the future, I would like there to be better integration with Git, as there are IDEs such as Eclipse that offer this integration in a much more elegant way than NetBeans.

In general, Netbeans is a very stable and complete IDE and does not have much to change in an eventual update since the features it has are quite complete.

Debugging: Watches, Evaluate Expression, and data inspection are limited.

Memory: Still uses a lot of memory, and a little slow before starting a run or debug session.

UI: Some bugs (buttons are not the same, missing edit buttons in some dialog boxes, sometimes NetBeans touches the configurations.xml files without any user change in the UI).

It is a very heavy load on the computer, especially when you compare with Sublime Text Limited plugins and themes. The forum is terrible, so any issues, you are pretty much on your own.

There are always rooms for improvement for any product. The good thing with NetBeans is that since it is Open Source, you can just go ahead and contribute whatever you want to change yourself.

Background scanning of sources on demand, disallowed by Options (processor usage, build cannot be deleted by the old version build). Angular2 plus its support.

The debugging mechanize could be improved compared to IntelliJ, for example. The support of Groovy and Gradle can be improved compared to the other IDEs.