I've gotten benefit from a smart speaker in my home.
I've got the Harmon Kardon Invoke Cortana speaker. I put it in my kitchen' and it's given a mentally handicapped person in my household new found abilities to play music, tell jokes, and provide random "tell me something interesting" tidbits that fascinate and engage her. Prior to this she was a technology shut in and I had to look up or do everything for her on the internet or with audio devices.
I don't use it for much else but it's nice to have radio and music hands free in the kitchen and a few other similar perks. I've used to create an ongoing shopping list which also appears on my mobile phone which is handy in the store. "Hey Cortana, add oregano and paper towels to my shopping list."