Yesterday I said "hey google, turn on the kitchen lights" because my hands were full and the switch was across the room. I wouldn't say it had a meaningful effect on my lifestyle, but it was useful at that moment.
That's my most common use of Alexa as well - turn on the lights, turn off the TV. Sometimes I will ask it to set a timer, but really it's a hub for my home automation. I would miss it if it was gone, but my life would go on.
If I were to look at the type of activities we use Alexa for in our household, most of our commands revolve around smart home, weather and lists/reminders. Once in a while we'll ask it to do a unit conversion or some search engine task, but that's few and far between.