What are the alternatives for offline-first databases? I have a project in the back of my head where clients to a simple central database would be frequently offline and I had GUN in my notes for doing that.
I'd say another option might be PouchDB in combination with CouchDB. That's what Hoodie uses.
But I don't see why you couldn't try GUN if you wanted to. It's disturbing how HN seems to demand a kind of "brand loyalty" regarding technology. Just use what works.