When I was experimenting – and building Nominal – last weekend, I thought it would be a cool feature to indicate which posts had been read by site visitors; which posts were new and which they had read previously.
I updated my site a few weeks ago (it looked very similar to this). It was rushed for no reason, and I wasn't very happy with it. In the last few weeks, I rebuilt Svbstrate completely – and learned a ton – so I decided to make a new site. But better this time.