I've only worked for one company that actually did proper QA testing. It's expensive and time consuming and often the main functionality is okay, so many just skips QA altogether.

It is probably daily that I encounter products and procedures where I can see that a given scenario is kind of a an edge case, but not an unforeseeable one. Given the scale of many things, edge cases happen pretty frequently and with ever more ridged organisations, lack of customer service, human interaction and a quest for ever more cost savings, hitting an edge case can be everything from frustrating to catastrophic for a person.

Generally I think we, as in humans, need to slow down.