Neither is the concept of subreddits, the difference between text and link posts, subreddit discovery, the community and culture... These were all hurdles that she needed to get through and at the end she gave it up. Too complicated.
The difference between her and most Reddit users is that she was determined to get active on Reddit: she kept trying for weeks.
The difference between her and most non-Reddit users is that she's quite tech-savvy. She worked in tech for 20 years. She fixes her friends' computer problems.