Typically low quality. 'One size fits all' situation, meaning this can lead to unpredictable results and major damage to the hair because it's putting unnecessary products onto your hair.
Aren't many differences between a permanent, semi-permanent, and demi-permanent box color. Since box color isn't tailored to specific hair needs, the box might say it'll fade out after several washes, however it may wash out sooner or last longer.
Box dyes also give very basic color options without a way to customize the color