Same here on regular consoles. We did use lua and once UnrealScript and the reduction in iteration time to seconds was worth any loss of speed in the short term (i.e. discover the game, then downcode what you need to later).

However, times have changed. The kind of games i'm interested in are ubiquitous in nature. I want to interact with it on the console, the iPhone, the PC, and on the web. I want to write tools that are cross platform. The browser is the ultimate cross platform.