In the status bar at the top of the site there is already notifications with counters regarding recent inbox messages, recent achievements, current reputation and current badges.
However, I was still wondering why the "Review" link remains static and why it does not indicate dynamically when there are some pending reviews? It would be more practical than having to manually check the queues and poll pending notifications (that's a good job... for a computer).
Actually, the question now becomes even "worse" since after having encountered this message I have the impression that this feature actually existed in the past with a dedicated orange counter:
This feature was apparently added in 2013 but has apparently been removed. Did it had some unexpected negative side-effects?
Edit: I'm more and more confused... I have access to the "First posts" and "Late answers" review queues since a relatively long time and never saw this button. I have now access to the "Low quality posts" and "Suggested edit" and reviewed a few "low quality post" without still ever seeing this button... And now I just saw it popup very rapidly stating there was one "Suggested edit" pending... Now, again, there is 1 first post and 1 suggested edit pending and it popups again but only tells about "1 suggested edit pending approval".
I therefore guess this button still exists but is linked only to the suggested edit queue, and do not take the other ones into account?