I have used the remove all feature myself on three Android phones.
Let me remind you also that a review doesn't necessarily have to cover such a feature, which is a given, having been implemented for a number of iterations.
You should inform yourself before making any kind of claim.
So what?
Are you stating that since Android (false information, too) and WP8 don't implement such a feature, iOS should be no different and avoid it?
Brilliant logic. Thanks for sharing.
Right from gsmarena review of Nexus 5:
"Last but not least, the Recent Apps list has remained virtually unchanged. It would be nice if Google finally adds a kill all/close all option."
http://www.gsmarena.com/lg_nexus_5-review-1011p4.php
Speaking about false information ...
Maybe YOU are the one that should inform yourself.