It's just that some days I get behind and it takes several days to catch up
during which I can't hit that button or I'll lose the nodes I haven't seen
yet.
Even if you don't look at the site for a few days,
the nodes you haven't seen aren't lost for ever:
there's an input on Newest Nodes to set how
many days back you want to list the nodes.
(It's however limited to max 8 or 14 days I don't know which one.)
Update: I see that it's also skipping the list of notes
if you're querying more than a few days.