I've got a RasPi 4 (4GB version). I never really put a whole lot of effort into it and just switch between SD cards as necessary.
Obviously, this is not a great solution. I was going to buy a Pi Zero 2 W for the OctoPrint so I could keep both services running simultaneously. But before I do that, I thought it would be cool if I could somehow put both services on my current device.
I've seen around this sub that people are running multiple services alongside Plex, but there's not much talk about OctoPrint.