> I understand the arguments for a margin collapse, but I don't see any historical analogues. How is this the top comment? It lists all the outliers and ignore

> I understand the arguments for a margin collapse, but I don't see any historical analogues. How is this the top comment? It lists all the outliers and ignores thousands of instances where fat margins caused a collapse. I mean, just what Linux did to the dozen or so fat-margin unix server companies is already a longer list of collapsed companies than provided in this comment.