Plex’s strengths is it’s ability to remotely stream without jeopardizing your network security.

Doesn't the Plex proxy stream cap at 2 MB/s ?

So unless you are fine with such a low bitrate, opening a port with Plex is also required, be it done manually or with UPNP. (Disregarding VPNs here)

Or am I missing some other way to stream content with Plex?