> RSS is actually already familiar to you if you have ever subscribed to a newsletter [...]

RSS is far better than a (digest) newsletter; you can browse individual posts at your own pace, keep some unread for later, and revisit them across sessions.

With newsletters, you either read the whole thing in one sitting or leave the email unarchived forever.

If only every newsletter had an RSS feed. But of course they don't - can't show you ads!