That's not true, actually. At work, we write lots of tests: unit tests, integration tests, and API tests, we have manual testers and QA engineers. Maybe it wasn't the case at the very beginning, but nowadays, any new feature or change must be properly tested. And our original project is kind of finished, or at least our customers pay for it and use it (we've just had the best quarter results in the whole history).
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,