I am up to 30tb for Plex storage that I serve up to my home theatre using shieldtv. Right now just using a pretty powerful pc (Ryzen 8 core) that does both my main (non gaming) work stuff and acts as the storage hub.

I would love to have a rack mounted solution where I can add drives in my theatre but I find it hard to determine how powerful the system needs to be to serve up 4k....and where the transcoding all happens. Mostly I don't transcode but I have family that connects to my Plex server and it has to be able to transcode....I have built PCs for years but find NAS terminology and tech very difficult to wrap my head around...

Yea it's really confusing to figure out the best way to run this stuff. I would prefer to have a NAS that I can just slap another drive in when needed vs a PC with limited space but from what I understand if the storage is separate from the location if the Plex server it can affect performance. With 60+ GB files for one 4k movie I see storage running out quickly.

All that stuff is here today and gone tomorrow. I prefer to have my own server with my media that no one can take away right when I am looking to watch/listen to it.

Also, if you have a high end setup, streaming is noticably worse than locally stored rips in original quality.