Warning: bad math and faulty assumptions incoming.
Considering it was discontinued in 2004 and people generally have reliable long term memories starting around 5-8 years old, I'd say the youngest person to reasonably remember BonziBuddy would be 20-23 years old. The peak of popularity would probably be 2002, when the lawsuit that shut the company down was filed, so the last group of people who would be widely exposed to BB and have memories of it would be 22-25 years old at the youngest.
As someone quite older than that demographic, I had completely forgotten about BonziBuddy and seeing this brought up is definitely nostalgic for me.
Considering it was discontinued in 2004 and people generally have reliable long term memories starting around 5-8 years old, I'd say the youngest person to reasonably remember BonziBuddy would be 20-23 years old. The peak of popularity would probably be 2002, when the lawsuit that shut the company down was filed, so the last group of people who would be widely exposed to BB and have memories of it would be 22-25 years old at the youngest.
As someone quite older than that demographic, I had completely forgotten about BonziBuddy and seeing this brought up is definitely nostalgic for me.