I have a microserver and various pis ( zero w, 2x 3b+ and a pi b)
With the exception of the zero w they are all still in action.
The pi b connects to the pi touchscreen and displays photos from a directory every 5 minutes.
The 2x3bs are running kodi to stream from my server.
The zero w was a camera recording and streaming 24/7 but I stopped it as I wanted to do other stuff with it.