Strip out all tracking, anti-competitive anti consumerist features, remove all AI, make it secure and with all of the extra and fancy features opt-in.
Literally just make a decent, respectable operating system, and you will win. This is how you win at literally anything right now. Just make it durable and private and secure and not extremely expensive and make sure it WORKS, and people will suck your dick from across the planet.
NOBODY WANTS AI OR MICROTRANSACTIONS OR TO BE PUSHED AROUND OR CONNED, YET THAT'S ALL ANYBODY IS DOING - THE POSITION OF NOT A PIECE OF SHIT IS LITERALLY UP FOR GRABS, YOU JUST NEED TO REACH OUT AND TAKE IT.