are we talking a wireless lan or hard-wired? Can I get a NAS and just do point to point wiring or do I need to get a router?
Hard-wired. And you can use a router, but point-to-point is advised.
So XXHighEnd knows to save your changes to the hdd (very cool). In essence this PC really can only be used for xxhighend and nothing else.
Nah, sort of;
If you dive more into XXHighEnd you will see/learn that RAMDisk operation requires an environmental "set up" that allows to save the changes WITHIN XXHIGHEND to permanent storage. Nothing super special about that, apart from it being very convenient that it happens.
The same thing now happens to our next dimension of RAM and permanent storage.
So you can try to think another way around :
Suppose you use JRiver, dunk that yourself to RAMDisk and change settings in there - now hope that provisions have been made by JRMC to save those settings for you to permanent storage.
This is unrelated to your quote, if you only also grasp this :
All OTHER means of changes, like given example of renaming a file, is not done by XXHighEnd. Still you can do that redundantly yourself. Think a virtual machine not allowing write changes, while you still want to change the base (you want to apply the writes after all). Normally this requires a re-gen of the OS. I did it more smart (sort of because I ain't - and if I was I would have made an incremental change to permenent storage (like backups can work)).
And do notice that we talk "Audio PC" and not a work PC or something. And worse : We talk about the physical XXHighEnd PC as well, because regarding drivers etc. I made it for that (sh*t happens with a pre-configured OS).
Clear a bit ?
Ah, I'm sure it already was. But true, you could say that this (PC) is for XXHighEnd only. But, what's the difference with a Virtual Machine without writing through changes, which is always for "a" purpose ?
The difference is that external factors now first imply the "no writes" (because we're in RAM) and that now provisions must be found/created to apply those changes after all. Just for convenience.