that "reader" is just
No mention of using the reader is in the man page for journalctl.
err, said man page:
The output is paged through `less` by default,
but G does not go to the end of the file. In fact, if press G, the stream freezes and I have forcibly terminate it.
G works beautifully, the log is just very long, so it's searching for a long time until it reaches the end.
from the man page:
Immediately jump to the end of the journal inside the implied pager tool. This implies -n1000 to guarantee that the pager will not buffer logs of unbounded size. This may be overridden with an explicit -n with some other numeric value, while -nall will disable this
cap. Note that this option is only supported for the less(1) pager.
is what you want to run!