Simply because the app is bundled as 3 apps. Team management and roadmaps plans are all part of the app, but are separate packages. When you look at system apps, rather than user installed, you will see that Jira itself consist of literally dozens of modules.
In terms of licensing though, you can see that you can only purchase the top one, the others are bundled with 1 and the same license.
Thanks! I was looking for the reason. So the reason is simple because atlassian want the modules as separate plugins.
Well it gives us some dependency while we deactivate and deinstall the main plugin. They are not automatically activated again as the plugin is active again.
