Manton Reece in response to the Twitter Notes feature:

For all of Twitter’s problems, at least right now most of the good writing we see on Twitter is actually linked out to external blogs (and yes, increasingly Medium posts). To shift that to be stored more on Twitter itself would be a setback for the open web. It would slowly train a new generation of timeline surfers to prefer Twitter-hosted content instead of blogs.

I see this feature being a lot like email newsletters. Some are going to swear by it, and business built around it. Which is a shame because when (and it is always when) Twitter falls to the wayside all these posts will be lost to time.