Software doesn’t need continual redesign and redevelopment at constant scale, nor is there unlimited need for new software tools in any one company’s wheelhouse, but the expectation is that software companies hire people and keep them onboard as long as they’re performing well, not that they’ll scale up for a periodic launch and then scale down again. And a company that did that — outside of the video game industry — would be shunned by developers (at least in a good labor market).