Personally, I kinda like it - and results in the member reading/scanning through a bit of the OP’s post before getting to the navigation bar (which on the whole is a good thing).
It’s a bit of a pain for lengthy posts such as per dahmage’s example - yet nothing a few decent hits of the ‘Page Down’ button doesn’t rectify.
Sure, but if you have already read the OP?
Also, on mobile there is no page down. I guess I can ask the doctor to send my Trigger Thumb bills to OT?