At least in my field (plasma physics), review articles are published infrequently, at random intervals, and their coverage is arbitrary (ie, even if they are nominally concerned with the topic you are interested in, which isn't guaranteed, they may leave out the particular facet of the topic that is of interest to you).
I wish there were incentives/support for more regular/frequent review articles with broader coverage; that would have been a huge help as a grad student.
