Any happy, healthy and productive working group with a manager and directs enjoys an environment where feedback is "realtime" and context sensitive. It has been this way since the dawn of modern workplaces. People got stuff done and companies flourished even without HR-driven company-wide "reviews".
HR departments, unfortunately, aren't satisfied with the annual hoop-jumping exercise that everyone hates but finishes in haste to get it over with. The fashion now is to drag out this process over the whole year. Instead of you and your boss having to "prove" your worth once a year to HR, you now have to do it several times a year, tracked and nagged by a "realtime" system. Goldman Sachs isn't the only company doing this stuff, it's all over the place, sadly.
For once, I would like to see large companies take a step back and reduce the burden of these stupid reviews, but it has only been getting worse and more annoying.