The plethora of IoT FOSS OSes with MIT/BSD licenses already show where the train is going.
Re:SDL Moves to GitHub
by pantalaimon on Thursday February 11, 2021 @03:50PM
(#26106961)
Those do target an entirely different class of devices / applications.
Yet here you are making predictions...
I doubt Linux will fade away until there is some major paradigm change away from Van Neumann architecture. It has survived and become dominant over 30 years by constantly adapting and innovating.