I thought Indy does. RDP is one of the fastest connection protocolos there is, if not the fastest.
As to your upgrade point, not that this matters, but I was on 6.1.2 up until three months ago. I certainly don't upgrade with each new version, but only because I get a little nervous with the main server upgrade with permissions and other things. But, ironically, with RDP on your own computer, and a shared .exe file on the server (or wherever), you should be able to install AC on 10 computers in under 15 minutes.
Plus............it's faster.
