I use a single curved 32" monitor, same setup as above most of the time via window snapping: code/result (UI, test suite, etc)

It's my favorite way to work so far.

The conclusion in this article seems pretty silly tbh... I'm able to use my large monitor to test multiple browsers and resolutions at once with instant feedback, leading to better responsive designs, delivered faster.

How do you do snapping on OSX? Can you talk more about good one monitor workflows? Do you have workspaces or all windows are in one workspace? Etc

Rectangle and other similar apps can provide simple snapping (drag to right edge: snap to right half, drag to NE corner, snap to top right quad, etc).

The only time I use workspaces is for things that benefit from huge windows: an editor with tons of files, 3d modeling, etc.

Rectangle for snapping: https://rectangleapp.com/

Single 32" works best for me, too. All other things equal, I'd consider curved an advantage, but it doesn't matter that much for 16:9 or 16:10. If you decide to go UltraWide instead though, I very strongly recommend getting a curved display. I couldn't make 34" UW work for me though -- if I use two things side by side, I need to keep my head sideways, and if I center something, there's not enough space on the sides for more stuff.

As for software, what I end up using the most is Unity, Unreal, and Visual Studio. I just wanna say I absolutely hate all 3 of them.