gk7ncklxlts99w1 but he created a simple QR backup tool and charged an absurd price for it. Someone made a free version of it.
Superbacked became free and open-source, he didn't like the situation the project was in at the start, but this can be effective for experimenting with the terrain, for example, to see if it's viable, it's not uncommon for new projects to be closed-source and then become open-source.
Josh from Side of Burritos is currently adopting this type of approach.
https://picsur.org/i/f642bc14-8c33-4fce-988e-a7a1cbe4247b.jpg
Hyperbacked is a fork written in Rust, but it has only 2 contributors and seems to have been abandoned.
I'm not going to try Superbacked, my desktop hardware doesn't meet the prerequisite, as I wrote above, you don't have to agree with everything, but like Josh, Naomi and TheHatedOne, he's not manipulative and he's currently giving good vibes, so I'm quoting him.