It's a combination of HN users self-selecting for certain traits, and ICQ typically having been used ~20-25 years ago when our brains were a lot more plastic.
I'm not sure what I ate yesterday for lunch, but I just tried my old ICQ, 6697979, and got in on the first try. The password was right in my head, 12 alphanumeric char which don't mean anything, and I never used it for anything else.
Conversely, today I had to use my domain password at work for a system not yet integrated with our 2-factor, and it was quite an effort to remember it, since I hadn't typed it in a week.
I'm not sure what I ate yesterday for lunch, but I just tried my old ICQ, 6697979, and got in on the first try. The password was right in my head, 12 alphanumeric char which don't mean anything, and I never used it for anything else.
Conversely, today I had to use my domain password at work for a system not yet integrated with our 2-factor, and it was quite an effort to remember it, since I hadn't typed it in a week.