We have been using Flow for all the automation needs that we always had, but never figured out a way to manage. From rich approval's process, to simply Sharepoint folder monitoring.
Recently, we managed put in place a simple PowerApp for sendng SMS text message to multiple recipients using Twilio, and it works incredibly fine! 3-4 steps, about 20 mins to set it up and test, and it was good to go.
Have more things to put in place, looking forward what else we could do with it.