What are the positive and negative impacts of the change in language?

Positive: There is probably a need for the change considering that it occurred naturally though the evolution of language. It allows for a greater range of expression though language.

Negative: Old ponies don't like change and will inevitably start complaining about the disintegration of language as it out to be and other such drivel. It also results in the occasional difficulties of communication across generations.

Note that this is from the descriptive linguistic perspective. For the prescriptive, remove the obvious negative implications from the negative list.