system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5; Why did Blackberries stop being popular?

They were among the first of the smartphones and seemed to have everything going from them, but not anymore. Why?
gpt
Blackberry was focused on the business market. Originally it was only a business that could justify the expense of a smart phone so the apps were focused on the concerns of businesses. Apple came along and decided that hardware prices have come down enough that justified a consumer level smart phone. Apple focused on the general public and their phones were successful. Very successful. 

Blackberry stuck with the idea that there were going to be 2 markets, a business market and a general consumer market because business contract are very lucrative. The problem is that many business discovered that an Iphone more than met their needs and they switched. It's been very hard for Blackberry to switch gears and it's been a slow decline ever since.