Most of the important ones like package managers, containers, not calling home etc are mentioned by the others. So I will mention things I don't think are discussed enough by linux switchers.
The one I didn't think I would yearn for but am really reminded of everyday are- desktop environments and window managers. My friends couldn't stop praising the UX but even after a long time trying to get used to it I still am annoyed by the application switching keyboard shortcuts, lack of ability to set system wide shortcuts for launching basic things like terminal. I won't talk about the lack of some cli applications I loved because I expected that when I moved(and it is better than I thought). I have tried iterm2, hyperswitch, rectangle. I understand that different systems have different behaviours and I can't expect it to behave the same but I have observed my friends, and others and the level of keyboard driven userflow I can achieve even in something like windows just seems worse here. It's not that it isn't possible but rather the behaviour has subtle quirks that I can't always rely on it.
And lastly animations and latency. Even after turning all animations, it just is slow. I was used to having applications open before my keyboard would even leave the shortcut key and here I find myself waiting for things to start. I thought I was being nitpicky until I had to use my 2014 model haswell laptop for something and it just was such a breeze compared to the provenly faster processor and storage of m1.
What's everyone's experience like?