"This is one of the huge advantages of the web over desktop software. Initial delivery to the desktop and subsequent updates cost significant time and headache. Redeploying to a server is just a matter of running a script."

This raises a good point about reuse. You wouldn't try to re-use the same bridge across a different span without modifications, but we require our software to run in different contexts (be it different web browsers, operating systems, versions of the language, et cetera.)