I use GNU Emacs on MS Windows 11, specifically, the pre-packaged pre-compiled distributions for Windows provided by Vince Goulet (https://vigou3.gitlab.io/emacs-modified-windows/). He also provides a bundle for MacOS (https://vigou3.gitlab.io/emacs-modified-macos/). I have used, and occassionally still use, Emacs on a variety of different unixen. I believe most of what follows will apply to any GNU Emacs distribution or derivative on any platform, but of course, YMMV.
By way of background, I've been using Emacs since the late 80s as an IDE for various programming languages (e.g., pascal, C, lisp, matlab, python), and as a general text editor. I've also got a lot of mileage out of it's features for calendaring, scheduling, note-taking, and agenda making. So, when I started using R around 2001, it was natural to do my R scripting and programming in Emacs (using its ESS package, which I'd already been using with SAS since the early 90s). When RStudio came out in about 2011, I did give it a look, but it was