Yep, I talked about this at NixCon EU 2023. Basically using a well defined base NixOS with Pantheon and Flathub configured so when family need "apps" they can get what they want from the desktop store front.
My talk inspired this fine project from [@gmodena](https://hachyderm.io/@gmodena ) 😁
https://github.com/gmodena/nix-flatpak