> These changes are happening because application requirements have changed dramatically in recent years. Only a few years ago a large application had tens of s

> These changes are happening because application requirements have changed dramatically in recent years. Only a few years ago a large application had tens of servers, seconds of response time, hours of offline maintenance and gigabytes of data. Today applications are deployed on everything from mobile devices to cloud-based clusters running thousands of multi-core processors. Users expect millisecond response times and 100% uptime. Data is measured in Petabytes. Today's demands are simply not met by yesterday’s software architectures. Is this true? There are surely more companies than before, but is most of the programming done for applications like this? I always thought that at any point in time, the vast majority (~70%) of developers are working on internal applications with users ranging from a few to a few thousands. Is there any hard data on this?