He is probably downvoted because of the somewhat condescending tone.

As for your question, I normally use PlainText. I type in something on my phone and when I turn on my computer later, dropbox announces that transfer.txt has been updated which is a perfect reminder. This works fine except when I am offline (I travel a lot and often don't have data). Now, I could turn on PlainText when I get back, to synchronize data but I often forget to do this.

This solution would work for me -- although texting to the US is probably going to be a bit expensive..

You have an old "feature phone" (old Nokia phones, for example) that can still text just fine, but not run more modern apps. This is a perfect application for that.

In short: the southern hemisphere. SMS is the internet of africa, among other places.

Maybe that wasn't the driving force behind the development, but its certainly a potential use.