It's rather you who has specific landscape use cases which you kindly listed, which is fine. I gave examples of very broad applications the vast majority of users do daily (Email, web surfing, working with documents), And these are just portrait in most cases. So the "any workflow" still at least partly applies to you too, unless you have a very unique way to browse the web.I don't doubt that you get more out of a 3:2 screen with your workflow, but any workflow is a very broad statement, and if it were so universally true 3:2 monitors would be more popular and my workplace would have a lot less ultra wide monitors and a lot more vertical screens.
I personally spend more time looking at landscape-format plans and wide flowcharts than I do Word documents, and I scroll those horizontally as much as vertically; so much that I often keep a trackpad next to the keyboard entirely for use scrolling and pinch-to-zooming (my diagramming app is in fact so non-vertical that I have it set to use right-click-and-drag to pan and the scroll wheel to zoom).
Even Excel, I'm far more frequently looking at tables with a very large number of columns and am more interested in viewing as much of a row as possible than many rows of data, so I'm far more likely to have an extremely wide Excel window on my ultra wide primary monitor than to have a really tall one on my portrait secondary monitor.
And while yes, lot of people do spend most of their time in "vertical" documents, the reality for my use case (and I believe the majority of my co-workers) is that I need to have 2-3 documents on the screen at once VASTLY more often than I need to see more than one screen-height worth of content at once. This is why I use an ultra wide and many others at my workplace use side-by-side landscape-oriented 16:9 screens.
Word docs and web pages, absolutely vertical... but if that is your primary need, then you're in theory even better served by a portrait-orientation monitor, which I have to the side of my ultra wide right now, yet not many people do that--only one other person in the office despite two thirds having at least two screens.
I've noticed that in practice, I rarely bother putting documents on my portrait monitor--the extra height/less scrolling just doesn't feel necessary for most tasks, even web-page reading or document writing and editing. Same reason, I suppose, that I rarely use my iPad in portrait orientation, either.
But with ultra-wide, we're not talking about 16:9 vs 3:2 anymore, that's a whole other use case, which is more like having 2 x 3:2 monitors next to each other.Nah. You totally skipped over the fact a lot of his co-workers use ultrawide screens.
“ I don't doubt that you get more out of a 3:2 screen with your workflow, but any workflow is a very broad statement, and if it were so universally true 3:2 monitors would be more popular and my workplace would have a lot less ultra wide monitors and a lot more vertical screens.”
Ultrawide screens are extremely popular these days for power users. I’ve said previously I’d love to have a 34” ultrawide but only if was Retina or near Retina. Unfortunately, all the ultrawides are lower pixel density, partially because Windows doesn’t need Retina as much for reasonable text quality.
Basically what you’re saying is only true if you only run one single app window on the screen at a time, but it’s extremely common to want to be able to run 2 or more app windows side-by-side.
I have yet to hear a technical or ergonomical reason why we started using 16:9 monitors in offices only recently, while for decades before, we used 4:3 or 3:2.