Possibility to show all conversation thread based on replies chain in chats and comments. And possibility to switch to chat view similar to forum threads (this feature is nice to have for reading comments)
The current "view x replies" feature allows to read a thread separately from the clutter, but can only be activated from the very first message. Also you can find that very first message by following the links on top of each reply, but it quickly become a tedious task if there are numerous replies to walk back through. The suggested feature (besides the tree formatting) would replace the current "view x replies" feature by a "view thread" feature available from each reply within that thread. When using the feature the same dedicated reading window would open than with the current feature, except that the window would be scrolled to show first the reply the feature was triggered from. In other words if for instance you select "view thread" from message number 39 out of 155 replies, the dedicated window would show the entire thread, but positioned at message number 39. And with tree-like indents.
Hinrich Mahler (@Bibo-Joshi)
I agree with Antoines description except for the indention part - TG is a messenger, not a discussion forum. A mid way would be to display subthreads as suggested at https://bugs.telegram.org/c/1088 .