I am biased towards vi-like commands, too
I think if we add this for power users, we might as well use "power user key bindings" too.
ctrl+j
for previous post and ctrl+k
for next post for example.reply
j and k
to jump up and down. In my news RSS app for NextCloud it’s the left/right arrow keys to navigate. In gmail it isg+n
andg+p
. As far as I know there isn’t a standard but happy to be corrected.