I use Siri to add things to OmniFocus multiple times a day, "Hey Siri, remind me to ...", a lot of people seem to use it for a lot of things[1]: https://www.reddit.com/r/apple/comments/549ytw/how_many_of_y...

[1] Well, a lot of people who use reddit and are interested enough in apple to be on an apple subreddit.