I use it constantly for brainstorming ideas and thinking out loud. Very rough first drafts of essays, stuff like that.

Basically whenever I just want to get my thoughts out and I'll be the only person reading it, so I don't worry about typos because I can always figure out what I meant.

It's a godsend in terms of speed. I type fast but my brain still goes faster. But I definitely speak faster than I can think.

It only works privately in an office or at home though, obviously. Not helpful on the subway.

My father in law (mid 70s) uses it constantly to compose text messages. I'm not sure I've ever seen him type one.

My partner uses it constantly while driving. It's illegal to use a phone while driving, and we have cameras everywhere that will catch you if you have it in your hand and smack you with a near $500 fine and points on your license. So dictation is extremely common.

To throw in my anecdote: very frequently. I've been using it since I first saw it as an option in 2013. Only on my phone, never on my laptop.

My mother does it because of arthritis. Constantly.

I use it when I want to send a text message that's longer than a few words. As long as I can do that without being a jerk to those around me.

I use dictation a lot, I hate typing on touchscreens and hate voice messages.

Me, all day pretty much.

I don't for multiple reasons, not the least of which is the possibility of an exploit that leaks it. I don't trust software.