1. I won't be using NixOS so that point is moot to me.
2. Reliable sandbox I can get using Apple Containers. I won't argue that the Linux experience is better, because it is. Alone it wouldn't be a reason for me to switch but it does count towards it.
3. Fair enough, I haven't had that issue on the Mac but that may just be because I'm working with other kinds of tech or I have the things I need installed in a different way.
4. Same as 2, really - unless I misunderstood you.
I appreciate you taking the time to reply. I have been primarily a Mac user for longer than I care to admit and lately macOS and the ecossystem have been growing more hostile to me. I've been on the lookout for a Linux laptop that wouldn't feel like much of a downgrade and the Framework 13 might be it so I'm trying to get as much information as I can before I commit (especially money) to the switch.