Once in a while I’ll check the rss feed for this website just in case something is off, and I belatedly found out that the image designated as the featured image did not appear in the RSS feed by default in WordPress, so the graphic of a haiku I made didn’t show up, and the text looked like a chunk of unbroken mess because there was no context that I originally posted it on instagram where it is the norm for me to write in one unbroken paragraph.
For notes I use custom fields to show the url of the origin if I post stuff from instagram, twitter or facebook, and occasionally I pin a location which shows up as a rendered google map on the website itself. WordPress doesn’t show custom fields by default as well. Without them displaying on RSS a lot of context is missing.
Now you can see if posts originate from elsewhere, in this example “originally published on: twitter” is displayed. I think the origin of the content affects the perception of the form, so this small detail is important to me.

Pinned locations if any is rendered as plain text, because I think displaying rendered iframed maps is iffy in RSS readers.
I also use custom fields heavily for other parts of the website to display relationships between content – I guess that would be worked on another day.