It's an L. I would say those generalise way too far, but that doesn't make the observation entirely invalid. But the thing is that in some fields and in some

It's an L. I would say those generalise way too far, but that doesn't make the observation entirely invalid. But the thing is that in some fields and in some areas of software, the industry has proved willing to drop older stuff and make breaking changes where it works out necessary. A 10Y old web browser barely works now. A 20Y old web browser doesn't. Despite its inadequacies, a huge number of people and machines have moved to IPv6. Javascript now isn't the quick hack that it was 25Y ago. We dropped DOS and Win9x and most other OSes with roots in the 1980s. When it proved impossible to extend them any more, the industry let them die and moved on.