The big change of the last decade has really been the cloud explosion and with it a serious bias towards valuing deployment and operations over development, to the degree that if you're doing development which is not about deployment and operations then you're a sucker.

The emergence of the LLMs etc makes the classic open source business model of relying on incomprehensible documentation to drive people to pay you as a consultant fall apart as they will get answers on demand. You just have to look at things like Docker to see how hard it is to turn even wildly successful projects into viable companies even before all this.