Nix / NixOS

I'm working through some necessary issues in VMs as I work towards dropping Windows, but it occurred to me that I should pick a distro my non-techy partner could use in the event that something catastrophic happens to me. I really like the declarative/immutable distros, but perhaps something more traditional with btrfs snapshots would be better suited to such a use case...?

It's no secret that NixOS has a steep learning curve, but do any of you share a NixOS PC with family/partners/etc.? If so, what has that experience been like? Could they take over admin if you were incapacitated?