For me, 2560x1440@144 on a 27" panel is by far the Goldilocks of writing code. 1080p feels like it's not tall enough with fat editors like Visual Studio, and anything bigger in size or DPI is starting to get too difficult to keep in focus.

I do also have a separate workstation with a 4K 43" monitor that I use exclusively as a standing setup. The monitor is fairly far back, but still requires me to move my head slightly to view the extents. This is the workstation I typically use for daily stand-ups so that I can have a ton of relevant information up all at once. I will also do some large-scale codebase reorganization efforts on this setup as I can have 3-4 solution explorers side-by-side and still have 90% of my monitor remaining for code editor windows, debuggers, explorer windows, browsers, etc. That said, this setup is tiresome if you are trying to laser focus on a single area of the codebase for an extended duration.

I will typically alternate between these setups throughout the day as appropriate.

Also, I do appreciate the color accuracy of the 4k 43" monitor (IPS/8-bit). I don't do a lot of artistic work, but when I am trying to see if a certain shade of grey makes sense for a element relative to its contents, having an accurate monitor really helps pick a good color code. With TN you get much more 'coarse' results and its hard to find a good middle point.