Embedded software developer here.
Oh damn, I thought I was going to be the only one here!
I don’t know how you get by with only one. Between source code, simulators/emulators, datasheets, requirement specs, log files, e-mails from senior devs with tribal knowledge not written down anywhere else, and a bunch of other bullshit, I sometimes find 3 24" monitors to be lacking.
Distractions aren’t a problem because I can easily use up all that screen real estate for a single task.
It’s only a matter of time before it’s not an option anymore. Every shitty new behavior they put in is an easy-to-use option at first, then a registry setting or policy, then even that goes away and it gets baked in.