This is so unbelievably condescending and frankly, gross.
Why do you get to choose what OS your wife uses? She likes Windows, for whatever reason. Why do you feel entitled to change what she’s using? How would you feel if someone tried to replace your Linux distro of choice with MacOS or a well-configured WSL2 setup? You’d probably be annoyed, even if you could do everything you did before, albeit in a different way.
Look, I understand the support concerns with a family member using an OS you don’t like. But the move isn’t to force them or trick them into something else.
I was able to get my mom to switch to macOS, which is my preference, 13 years ago. She was already used to iOS and Macs made more sense to her. My father, on the other hand, does not like Macs. I was able to get him to use a Chromebook for a time, but it broke and he went back to Windows. A few weeks ago, I bought him a new laptop that I got a great deal on (that was the price of a mid-tier Chromebook but significantly better specs and a much larger SSD), installed some extra RAM (that he probably didn’t need but he’s my dad and I love him and it was only $50) and I did a clean install of Windows 11 before I ever even logged into the machine. He’s exceedingly happy. And without the pre installed malware, I’m very happy to act as remote tech support if I need to.
When I shared this with people, the overwhelming response from fellow nerds was that I should have bought him a computer he did not want (a MacBook), a lesser-computer that he’d already had a bad experience with (a Chromebook), or forced him to use Linux. You know what my dad would do if I tried to force him into Linux? He’d go to the store and buy himself a more expensive and shittier Windows laptop than the one I got him and then get suckered into Best Buy Geek Squad bullshit. And I’d still be stuck supporting him on Windows. But now it would be even worse.
I say all this because your wife, like my father, is an adult. And she gets to choose what computer she uses. She’s not a child and she’s not your property. Let her like what she likes!
And trying to convince someone that Libre Office is the same as Office 365 is a really, really mean thing to do for anyone that shares documents with others.