I got an LG DualUp that can rotate to either vertical or horizontal. It has an almost but not quite square display. I also usually have multiple mux'd sessions

I got an LG DualUp that can rotate to either vertical or horizontal. It has an almost but not quite square display. I also usually have multiple mux'd sessions and vim with at least a couple of splits on the screen. I can't say that it makes a huge difference compared to using my Macbook with the built-in 13" display -- I don't have any good way to measure my "productivity." I think it helps mainly because I can make the text larger (good for my old eyes) without losing too much content/context. I also sometimes work on an iPad, which has a better screen in terms of resolution and sharpness than the LG, so I can use that with small type sizes and not strain my eyes. For me, the main advantage of the iPad is staying focused on one thing -- no overlapping or multiple windows, just one full-screen window with the task at hand. With larger displays I always end up with overlapping terminal, Slack, browser, email, etc. vying for attention. I switch context with vim buffers, tags, and the ctrl-P plugin (fuzzy file finder). I use a paper notebook and pen to take notes and keep a stack of things to remember. I use GNU screen instead of tmux, usually with four or five sessions, but I don't split those into windows, I just switch between them with hotkeys (one for a vim window, one for a MySQL/Postgres/SQLite CLI session, one tailing the log file, etc.). I developed most of my work habits a long time ago (decades ago) and have stuck with them. While objectively perhaps not as "productive" as possible, familiar habits and tools have a lot of value, so while I do try new things and experiment with my workflow and tools I tend to revert back to what I don't have to think about too much while using it.