There were three main limitations on early Hebrew morals: the field of ethical obligation was tribally constricted; within the tribal circle certain classes were denied full personal rights; and the nature of moral conduct was interpreted in such external terms of custom and ritual as to make small demand on internal insight and quality. (religion-online.org)
With watchOS 2, available today, Apple has tackled two of the Watch's main limitations directly, native apps and third - party complications, while filing down some of the rougher edges that shipped with version one. (mobilesyrup.com)
The main limitation of O'Mara's book is a philosophical one. (firstthings.com)