I never know that the MS OS was able to support 8 or more USB controller..
( never had the time for testing this features)
Nedim..I think you there still not have understand what is the difference from VST and multiple ASIO hosts.
For the VST, you need one host foor open it, like DAW Repaer or so on and ONLY one host at time then is able to run the VST.
If you use Reaper, mean that you have to create a session with the all VST open and every time you have to load a new session for one different setups.
Nice where IF you are able to run the Forte + the Reaper...but on windows is NOT possible.
On Linux Jack, we can running up unlimites ASIO host, it ean that EACH ASIO host sounds engine is like a independent sounds expander:
In this way on each ASIO expander you can also connect one external USB controller or USB keyboard and play direct to this host.
Here you can see one new example:
http://www.lionstracs.com/store/komplete-os-p-244.html So.. if you have running on MS 10 ASIO sounds host, press one KEY and they will run automatically, then you can also connect externally another 10 USB master keyboards and play on each keyboard the desidered sounds Host engine.
get the idea?
( try under windows if you are able..
)