Someology

Convenience.

Some jerk company (like Google) cannot suddenly discontinue my entire reader with all my feeds, because its mine, on my server. But because it's a web app, I can use it from any device, unlike a local app. After Google killed reader, That was just too annoying. Self hosted since.

Freshrss is pretty great.

There are also millions of people with intellectual challenges and horrid childhoods who do NOT go out and murder people.