Hardware is practical. It just needs an internet connection, firewalled to a relay and websocket only connection, from where it can act as a home bunker
this already exists, just needs polishing up
Social recovery, cloud partial key-material will help this.
Hardware is not practical for Nostr, the signing happens too often on every interaction.
Imagine if you'd use hardware for every zap 🙃
nostr:nevent1qqs9dczn8slzmpevlyx0dwnykvy334lycznzzpt8c88az5qnh5nhypc2degtc
Discussion
That's great for a hand full of people.