I think that, even you and your 23 year old daughter, will eventually migrate your devices to Windows 10. Nothing to fear,and it will actually be a great upgrade.
MS might lose thousands of users, but, they also have over 1.5 billion devices in the wild with Windows inside. So, get over it.
You know what breaks my heart?
That my mother, living a thousand miles away, will never see a video of her great granddaughter because of that attitude. That her mother won’t either. That my in-laws are now stuck on their farm with nothing more than a phone.
Someone will make a mint if they ever tap into that market for a reasonable price.
You do realize that Microsoft has to greatly retreat from their Phone interface for desktop Windows 10, right? Windows 10 will be an easier move than 8 was for people.
Get over yourself. Microsoft admits it was wrong, you should, too.