Just wanted to mention: the Community Edition of IntelliJ is open source. I used to routinely build it from source (but haven’t tried that in a few years). You might have fun making the extensions you want for more extension languages.
I have been using Emacs for 40 years and still love it, but I do find myself using VSCode more often now for Python work. Emacs has very good CoPilot support, but it sometimes lags a bit behind the support in VSCode. I also have started using a proprietary MarkDown editor instead of Emacs or VSCode.
For me a big draw of Emacs is that I have it easily configured for almost all programming languages I use.
I have been using Emacs for 40 years and still love it, but I do find myself using VSCode more often now for Python work. Emacs has very good CoPilot support, but it sometimes lags a bit behind the support in VSCode. I also have started using a proprietary MarkDown editor instead of Emacs or VSCode.
For me a big draw of Emacs is that I have it easily configured for almost all programming languages I use.