Fred Wilson, in a post where he contemplates his blog becoming an email newsletter to reduce his technical debt in running a blog:
Many AVC readers don’t bother with any of that and simply subscribe and read via email. For them, AVC is an email newsletter. The number of readers who engage that way has been growing a lot in recent years and it is now the majority of readers. That speaks volumes to me and suggests that is how most people want to get this content every day.
Should I be surprised? I don't know but I am. I can see his reasoning - why have the overhead of software, hosting, maintenance, etc. when you can "just" use email?
But the thing I believe he'd lose, and miss, is having permanent URLs for each of his posts on a domain name that he owns. And I said so in his comments.