Nuxt generates routes base on files in pages directory, Quasar didn’t.
For a static or semi-dynamic set of pages, a nice to have. For a full blown app, not so much.
Nuxt generates store base on files in store directory, Quasar didn’t.
If you follow the store pattern that is standard for Vuex, you don’t need anything else. Not an issue.
Nuxt doesn’t support the building of Cordova, Capacitor, Electron or Browser Extension apps, Quasar (CLI) does.
You can use Quasar’s Vue plugin and work with Nuxt too, if you want just the UI.