Personally, whenever I long for a second monitor, I'll use my iPad and hook it up via duet, which is usually only for web-dev where I need the browser to be a m

Personally, whenever I long for a second monitor, I'll use my iPad and hook it up via duet, which is usually only for web-dev where I need the browser to be a minimum size, with live reload. Else I heavily use spaces (macOS Mission Control thing), iTerm with quake/visor-style terminal on hotkey, and usually have my code wrap around 80 chars, which gives quite a bit of screen real estate leftover on a retina mac. I greatly prefer mobility over a monitor, and back when I used to have extra monitors it didn't provide that much more of a benefit. It would still be as much of a context switch the distance my eyes would travel to that other space on the monitor, as pressing ctrl + 2 into my second space.