This may not be one of the pressing problems in Discourse, but.
Sometimes ‘we’ find relevant threads using the search function, and sometimes those threads are known to us from past times and have many posts. Clicking on a thread from the ‘catalogues’ positions to the last post we read, but going through the search return list positions at the beginning.
Sometimes we do not pay attention to a thread for a while and many posts build up but we do not want to read them all, same scrolling to skip them.
Scrolling through to the end can be (to be kind) irritating in (esp) mega-threads. It would be nice if there was a button to ‘position to last post’ after entering any thread.