I've used Chrome since it was available for Linux and I've never once had Flash take down the entire browser. In fact, I can't say I've ever had a Flash crash at all in Chrome. Funny enough it crashes rather frequently in Firefox (still doesn't crash the browser itself though...)
Right, it's obviously dependent on a lot of factors. Apple wouldn't even support it on the Iphone. For general users it may work well enough with the right environement, but I use Linux for development and I have little use for Flash compared to the relatively big impact that it has on system resources.