I’m the one who migrated off macOS, but I’m still heavily on iOS. All of my family is with iPhones, and we have a bunch of iPads. I’m having MacBooks, and they all run Linux (they’re old Intel models, and work perfectly well on Linux). Our home computer is on Fedora too.

As for the migration, I’d suggest making an attempt at migration with some old laptop: ThinkPad or even older Intel MacBook, the Retina 2012…2015 line up works really well for me. That way she’d have an opportunity to slowly learn and compare.

Apple’s ecosystem wasn’t bad when I migrated, and I was somewhat scared to switch fully. I did that only when I realised I haven’t touched my macOS MacBook for years! (We’ve been watching TV series off it, to keep the battery functioning more or so.)

Also, what helped is me realising I don’t need that tight integration between the phone / tablet and laptop / desktop. They’re different devices: to consume content vs to create it. So, it helped. But, I’m still learning the new apps. Particularly the design ones are awful on Linux. Figma is mostly the same, but Inkscape is just miserable, but I’m trying to keep using it, even despite the interface being terrible. Gimp turned out to be okay, more or so. Krita was mostly good too, so I don’t miss Photoshop. But I do miss video editing software. I hope Blender might help some things I miss, but I’m yet to learn it.

Interface wise, I think Gnome is perfectly fine for a macOS refugee (just search for the solution to keep cmd + v behaviour, there’s the project for that, I forgot the name: Toshy something; I use my own shortcuts now). However, you can make KDE behave very similar to macOS, to ease the transition.

The primary pain point is the apps. They’re different, and usually worse. Sometimes they’re better, if you strive for simplicity. So, it’s a mixed bag. Myself, I don’t see myself going back. I may use a MacBook with macOS, but my primary system at home would be Linux. As I have too many tiny little things now that are Linux exclusive.