Questions about the difference between RFC calls with and without JavaProxy

Hello,
I have a two questions:
1. Why is it more user-friendly to access SAP data in conjunction to plain JCo calls as explained here http://help.sap.com/saphelp_nw04/helpdata/en/79/c6213e225f9a0be10000000a114084/content.htm? Waht's exactly the reason for?
2. What's exactly the runtime shown in the picture here http://help.sap.com/saphelp_nw2004s/helpdata/en/ed/897483ea5011d6b2e800508b6b8a93/frameset.htm?
Regards,
Armin

Moin Armin,
from what I understand from the first link, SAP is probably trying to say that it is user friendly because not everyone needs to be concerned regarding the actual JCo calls to the SAP backend. Rather they can simply work with the generated proxies as if they were actually working with the SAP Tables. The mapping, JCo calls and data transfer is taken care of by the Enterprise Connector.
For instance, you can generate proxies of the BAPIs on your side and let 10 users work with the structures and tables and when it is deployed, the JCo calls are automatically taken care of (from the SLD).
The figure in the second link just shows the runtime to illustrate that the native calls are hidden (again probably the same point I made before).
I am not sure, just my interpretation
Bye,
Sameer

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