There’s also https://www.trinitydesktop.org/ which is a fork of KDE 3.5 still being maintained.

Huh, used to see this regularly, but have not seen it for a few years now…

I mean, it could most definitely be better, but I really don’t think that it’s worse on Linux. Error handling is one of the hard problems in computer science in general.

And well, at least you do get easy access to logs and error messages on Linux, which makes it infinitely better in many ways, but is also at least partially why this post exists.
On Windows or such, you’d instead put a vague description into a search engine and hope someone had the same symptoms before…

I mean, there’s still some download managers around, for example:

• https://f-droid.org/packages/com.gianlu.aria2app
• https://f-droid.org/packages/com.tachibana.downloader

But yeah, I imagine this functionality is now largely integrated into the apps that want to trigger the download. The advanced downloading functionality can just be a library and then the respective apps just need to strap a UI on top.

The only real advantage of a dedicated app, is that the other app’s APK size can be smaller, which isn’t too big of a deal anymore.