Would you be able to write a script that is able to save and retrieve the last visited page number, opens the WO thread, passing the information to the URL and opens the thread on the page where you left it last time?
IDK exact ways, but in theory, if the browser is able to inject scripts (developer mode), you could easily refresh a bookmark on every page load and then just call that bookmark from the script that runs after clicking the according stream deck button.
Would be nice. The "Show new replies" seems to not cooperate well with how browsers will reload the page sometimes when a computer is rewoken from sleep. I have taken to clicking on the last-post-I viewed's title which refreshes the page with new stuff but keeps me where I left off.