Shave With A Straight Razor
| Field | Personal grooming |
| Went Obsolete | Never, but took a big hit in the early 20th century |
| Made Obsolete By | Well-marketed disposable products |
| Knowledge Assumed | Hand-eye co-ordination |
| When useful | Whenever you find it silly to buy 5-bladed disposable toys that don't work as well |
Not obsolete. There is a large group of people who still shave with straight razors, and a growing group of young people doing the same. I shave with a straight razor. Who cares.