Cuz as a millenial I've been using tomboy / gnote as a personal wiki long before 'zettlekassen' showed up on HN, and I know a few others who run more online wikis.
...but zettelkasten is a concept that's hundreds of years old, so it seems strange to assign it to a young generation. I think it would be more accurate to say that personal wikis are the millenials' zettelkasten.
