Interesting, I didn't know Windows 8 has many features, but I don't think I can consider install Windows 8 in a Pentium 4 3.0 GHz with 3 GB RAM.
You should not consider ANY old OS, really ever. Outside of learning what support used to look like, which is effectively worthless, conceptually using an old OS is a bad idea. Windows 8, especially, is only one generation newer than Windows 7 which is already crazy old. Windows 8 is something like eleven versions old already!
I'm confused - You're using folder redirection, so the local copy of the data is only there for speed or network connectivity loss. So there should be nearly zero data loss if you delete the profile after the user logs out.
I'm not sure if there is a reg key on Windows Workstation OS, but there definitely is on Server OS for Remote Desktop Services.
This was something I've seen often turned on to keep the local storage needs of the RDS server from ballooning out of control from left over profiles.
User logs into RDS, downloads profile, user logs out - copy is pushed to the server and local directory is deleted.
Pretty standard practice.
I'd be surprised if this wasn't available on say Windows 7, etc.
No - User accounts are 'left' so that is connection to the AD / DC is lost, then the user can still log on.
That's not totally true, all profiles files are left, that doesn't mean you can still login to it necessarily. There's no process for AD to talk to the local computer to tell it the user was removed. It is just a directory service, The local computer has to request to login to the account. There is no method AD to tell computers anything changed without them requesting.