When does "Windows" become enough of a liability that it starts losing market share? Will that ever happen? Or will Microsoft start building more secure versi

When does "Windows" become enough of a liability that it starts losing market share? Will that ever happen? Or will Microsoft start building more secure versions before that happens? I'm pretty excited about Microsoft adopting Rust as a development language. I think building more of their products with "safe" languages is the only way to stem these zero-day flaws. Even then, it might not be enough. There is a LOT of code in the Microsoft orbit; maybe too much to change. Here's a thought; what if Microsoft spun off another "shadow" company to build an ABI compatible "Windows" product? Kinda like Disney created Touchstone Pictures in order to release "R" rated movies.