How many montiors do you have?

A few years back I bought an extra monitor. I thought that it would increase my productivity and unlock computer-using superpowers. However to my disappointment I actually disliked the experience of having two monitors. I believe that the minimalist idea of "less is more" applies greatly to this specific situation. I'm a software engineer and even I found it to be too much for my work. After all, we have alt+tab or cmd+tab to switch seamlessly between monitors. Another argument against two monitors is neck strain. Sure the monitors may save you time, but the cost of moving your neck to look at them may not be worth it compared to keyboard commands.