A 'sealed' retaining wall where the stones are interlocked or even glued/mortared together would probably have a higher load capacity than one made dry/unadhere

A 'sealed' retaining wall where the stones are interlocked or even glued/mortared together would probably have a higher load capacity than one made dry/unadhered. Or someone could simply like the aesthetic of a more 'filled in' wall, regardless of practical considerations.