For new projects, my understanding is that Apple is using Apache and not the APSL any longer. Swift for example. I just looked at XNU and it is still under the

For new projects, my understanding is that Apple is using Apache and not the APSL any longer. Swift for example. I just looked at XNU and it is still under the APSL. Does anyone know why a company would not want to go back and change the license of a project? Is it that the company doesn't have the copyright but the individual developers? Even if all the developers only worked for the primary company?