I use it and love it. Having the metadata (tags, dates, ...) of your pages available to query and organize is awesome. I also love the tagged tasks feature.
Yeah, UI with rust is shaping up (generally and especially for Android).
Oooh... Android. Congrats on the release. I really gotta try this out. I like QML.
Very interesting. Cross compilation is always daunting.
I'll just throw zig on the ever growing list of 'things to take a look at'
I use nextcloud.export which comes with the snap (https://github.com/nextcloud-snap/nextcloud-snap/wiki/How-to-backup-your-instance), but the backup app looks nicer.
Note that due to new posts appearing the results might overlap in content.
You might need to get them in batches, i.e. use the page parameter to get multiples of 50.
If you know of any FOSS, offline editors for Android which can do what silverbullet can, drop a link.