This became more obvious to me working from home though I should have realized it earlier. I was already using an external display (27") - then switched from that to a 43" inch (with the 27" moving to the side in rotated-portrait mode). The productivity gain was day and night - being able to glance at a 2x4 grid of code is a big jump from constant Alt-Tab. My only regret is not buying it before the prices started going north on account of wfh being wide-spread.