Until 2 weeks ago, I would have answered: that I can’t use the same app/site to read RSS as I can to read documents that I manually saved, so I have 2 apps and queues (Feedbin and Instapaper) for 1 resource (my casual/quick reading time).

But… the service I use, Feedbin, just implemented that: https://feedbin.com/blog/2019/08/20/save-webpages-to-read-la.... The saved pages could use better categorization (tags/folders), but Feedbin has those for RSS feeds so I suspect they’ll exist eventually. If/when I can categorize saved pages and stop using Instapaper, I can’t think of anything else about Feedbin I’d change.