Thanks for feedback! In settings you have two options regarding threads. You can turn off the lines, and you can choose to have the threads collapsed (first level) by default. You expand and collapse the threads by clicking on the lines. If you turn off the auto-expand, it will be more like Jumble and less like Reddit.

The replies is sorted different order on Nostria and Jumble, the latest comments are on the top (for first level), then replies to replies are sorted oldest to newest.