2021/04/11#p1
The full post titles feature should now be sorted on the demo site, including RSS feeds. I'm still debating whether I'm going to port it back to my live blog. Maybe I will want to draw specific attention to individual posts by way of a title, especially if I do implement the indentation idea I was having – there could be independent threads within a day.
Just my brain going round and round, working overtime on features I may never actually use.
A number of features here are achieved by using custom markup within the body of a post (inspired by wiki style markup) so I need to document all of this properly. I think section indentation would probably be easiest to achieve using something similar at the start of the text. I've got some ideas as to how I would do this but need to conduct some testing before making any announcements.
2021/04/11#p2
Indented posts are a go! Inserting >> at the start of a post causes it to be indented. I'm also trialling "title only" posts (I previously had it that the content was compulsory) so that a title can be the header to a series of posts without needing to add any text at the top level.

2021/04/11#p3
Indented (sub-) posts will only make sense when organised chronologically. Now that I've got both titles and indentation sorted I think I will now retrofit this blog with the functionality – I'm all for options.