[achikin]

I think Apple software is popular not because it's own value and features, but because:

1. It's free

2. It's preinstalled

3. It's well integrated

I don't think I'd use Mail, iMessage, Safari or Preview if it was not installed by default and set up so it is a default app. Feature-wise I'd say Apple software it good enough not to bother installing anything else and that's it.