Joe would often quote Wirth as saying that yes, overlapping windows might be better than tiled ones, but not better enough to justify their cost in implementation complexity.
RIP. He is also a hero for me for his 80th birthday symposium at ETH where he showed off his new port of Oberon to a homebrew CPU running on a random FPGA dev board with USB peropherals. My ambition is to be that kind of 80 year old one day, too.