My dad shaves daily and pays zero attention to taking care of his brush or even drying it after shave. An Omega boar lasts him around 5 years. I recently gave him an old Simpsons Berkeley that was shedding and last time I saw it, it was in really poor shape. Based on this single data point, I assume the average man out there needs to use boar brushes and change them every 5 years or so. A nice Badger brush is a terribly poor investment for someone like my dad