Portability, isolation, the ability to run pretty much anything inside. They do consume more resources, but if they're that much slower then there's probably something wrong in your setup.

I've tried it a few times, never stuck. I guess it's just convenience, it is a well integrated piece of software, especially if you use both LXC and VMs. Personally I keep using virt-manager and Cockpit.

I'm not sure if any app syncs progress with eReaders, but I haven't looked into it. Maybe KOreader can? Other than that Audiobookshelf works well with ebooks. I haven't tested it with graphic novels, but it does handle regular ebooks (PDF and EPUB) just fine.

The Six Bullerby Children by Astrid Lindgren. I was maybe 9 at the time. I should reread it someday.

Translations can get you results ranging from hilarous to horrible. Especially crowdsourced.

Translation got me. It's Dashboard in English interface.

Go to Cockpit > Libraries > Manage library, there's an option to automatically refresh metadata from the Internet every 30-90 days.

It does not match my description, unfortunately.

I've seen codebases that had old testValid2 style of test as well as fully fleshed out conversionReturnsNullOnEmptyString style. Working there made me apreciate proper naming. I know different test frameworks in different languages let you name the test separately, but it's a bit of an effort duplication.