I like IDEA plenty... it's better in some ways than Eclipse, worse in others. I don't get why the Java dev market swept wholesale over to the paid-for tool in preference to the free one.

(edit: actually I think the reason may be that there was a perception that Eclipse was buggy/slow but I think that was always down to bad plugins - I'm not sure if IDEA had a better plugin system or just better curation of them)

I haven't itemised it, but Eclipse has most if not all of the features you list.

Maven and Gradle are indeed build tools, there I was just addressing the original question of "outdated" tools that I still use in preference to the current shiny one. Confusing in context I admit, sorry.