> the cost of switching is just not that high.

For you. I mean, obviously it's still high enough that they're not switching. Beside the point, I'm bouncing between the different OSes at home and work, and honestly they're all deeply broken in different ways that require significant effort to make the best of it. I get people hate ads, so Windows is at the bottom of the list, but honestly I could care less for that additional 2 min of initial tweak when I'm spending half a day doing the setup anyway.

On Notepad stopping being raw text only, the main issue to me would be the safety it provided. Being first party meant never having to care about security (e.g. the company getting bought by a random malware vendor) or availability.