If it happens, it would be the most jaw dropping event of the decade. But MS has a room to keep their own ecosystem as losing it will have less diversity as we

If it happens, it would be the most jaw dropping event of the decade. But MS has a room to keep their own ecosystem as losing it will have less diversity as we've seen when they dropped Edge not to mention the world will come to a halt without Windows that can run apps from the last 20 years. Having a UNIX kernel at the core would be really nice which would make developers easy to port apps between OS but how would the world deal with all the irreplaceable apps on Windows?