I love this idea - https://theunderground.blog/

an experimental blog that is only available to read through a feed reader.

I just love blogging though too, and think RSS is an under utilized delivery system. I am currently subscribed to a lot of blogs via RSS and it's just such a joy to see what treats are in my inbox in the morning. I think I will participate and make my own RSS only blog, or at least, be able to denote parts of this blog to be RSS only.