For me, the second screen isn't there for me to focus on. It's there to keep the focus on the main screen. I keep my less-used programs (spotify, discord, etc) on the secondary display so I don't have to constantly alt-tab on my main display.
The multi-screen trend is now pursuing its mainstreamification to every offices and home desktops. But at the same time Earth is sending us warnings: we need to slow down. Given the state of our knowledge on that matter, I am surprised that the general consensus on YN is not to have less screens and reserve the resources to better usage.