I must also be a caveman, I have at most 4 windows open, they are pretty much full screen, and I swap between them with a mouse. I don't even have that many browser tabs open at any given time, maybe 5-10 max. I feel old when I see kids these days using fancy window managers with custom ergo keyboards and no mice, while they hack away in neovim (is that still cool?) and chat on a platform I don't even know exists yet.