What's so hard about copying the music that you know you're going to be wanting to listen to to whatever device that you're going to have with you and then just listening to it? Why does it have to be streamed? If you have everything on an NAS then just use Windows file share and go to that folder and drag it to your foobar 2000 on your computer. If you're out and about and you want access to all of this then set up a VPN server on your router that also has encryption so and then set up VPN client on your phone or whatever and then connect in to your home network when you're out and about and then you can access your home storage...
I hate Plex I hate the way it makes me reorganize everything and tag everything when all I want to do is go to the folder where the thing is and put it in my media player which is something that I can just you know do. I feel like a lot of you were thinking about this in very strange ways when you could be solving it with very simple ways
And what's the obsession about not using local storage? My phone has over a hundred gigs of storage. My computer has terabytes of storage. Laptops for years have had like 500 gig drives or more. Companies still sell digital audio players and some of them also have Bluetooth in fact a lot of them have audiophile quality Bluetooth.
But no you have to talk about things in terms of Rsync and S3 buckets because you're a fucking tech bro. You have to talk about things in terms of services and all this crap when you have the simple thing right in front of you. I don't mean to be like incredibly rude sounding about all of this but I see this topic come up so much and I feel like a lot of people can't see the forest for the trees when it comes how to handle their own home media. Music comes out of speakers. Music is contained inside of a digital audio file. Connect a device that plays a digital audio file to a speaker either through wireless or wired means and then you have... Music! It doesn't need to be streamed. If you need it in your car? You have a phone right? You have an AUX Jack? Plug in a usb-c sound card thingy to your phone if you need an AUX Jack on your phone cuz it doesn't have one and now you have the ability to wire your phone to the AUX Jack. Get a dedicated device if you don't want to do that. Again digital audio players still exist. Oh but you need to Scrobble all of your music that you ever play because you need a record of everything you've ever listened to... Good thing a lot of digital audio players just run Android and have players that have that functionality.