I really genuinely like this change for orthography. The feel & sound of spoken language is highly sensitive to the context and formality: you talk differently giving a speech than you do at dinner with your family etc. It's cool that we're adapting the written forms to more completely express the full range of formality that we actually produce written language in now.

The details of orthography are all just convention and tradition anyway. As much as it pains prescriptivists and peaked-in-high-school wellactually pedants the true language is the spoken and writing is merely a tool we use to represent it. These additions make writing a more complete & capable representation.

And from a more CS view it's cool too. We've hijacked sometimes-redundant punctuation to convey nuances of tone and intent. Essentially increasing the "bandwidth" of writing.