On a similar note I vastly prefer Maven for my own Java based projects; I despise Gradle as being strictly inferior.
Most of that is also available in some form with VScode plug-ins, but I prefer Jetbrains's monolithic approach with batteries included. It's what I want from my IDE (everything out of the box).
And aren't Maven and Gradle build tools, not IDEs? (Sorry for the noob question; JS dev here)
(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Maven and Gradle are indeed build tools, there I was just addressing the original question of "outdated" tools that I still use in preference to the current shiny one.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.
It rings quite true - new tools comes and gets the market because they are the new hot shot in town (like eclipse and then intellij once was). Its only matter of time before VSCode will go the same way.
As for eclipse I personally blame lack of funding and interest from new open source devs after it lost its status.
I still use it daily but with each new Eclipse release and my code base growth it really slows down to a halt sometimes and it becomes more and more frustrating. Maybe its time to switch to something that is kept alive by more than few old guys.
Super simple tool that I use for everything from project templating to code generation to LLM driven docs.