![](https://hexbear.net/pictrs/image/7e8d5408-881d-44be-96ed-78f21c878bbb.png)
![](https://lemmy.ml/pictrs/image/1f910de9-62b5-43a9-8c93-94821c945577.png)
I only ever see notifications of direct replies, not indirect ones.
Definitely by design. I do not want to receive a geometrically increasing number of notifications as a comment chain expands underneath my comment.
On reddit (maybe it was the Enhancement Suite) IIRC is an option to Watch a thread, which basically does what you want
Mobile traffic far outweighs desktop for most sites, so it makes sense to do so. It’s expensive to maintain two UIs, so most sites just go with a hybrid approach that works well for mobile and fine for desktop.