Not for me, I am “out of sight - out of mind” and on a regular day I need several tools (for example code editor, several terminal sessions and at least a browser session). When I’ve tried one screen, I can space out for a long time because I have to keep reminding myself to bring one of those tools to the foreground when I need them. I need to see all the relevant things in front of me.
I don’t really use any social or leisure sites on my work set up; I use a separate computer for that, which makes it easier to do one thing at the time. At most I have some music in the background.
At the rate of one gram per hour.