Full Text vs Summary of RSS

Should RSS output the full text or just the summary? This is not a new topic, but it's one I've been asked about frequently by friends recently, so I'd like to share my thoughts. First, for readers, obtaining the full text of a blog via RSS is undoubtedly very satisfying: open the reader, press the update button (if it’s an online reader, you might not even need to press this button). Any updates from which sites are immediately visible, and the reading process doesn’t require opening a browser, making it highly efficient while also aiding in knowledge accumulation and retrieval. However, we should not overlook some drawbacks of full-text RSS.