Sure, RAM is relatively cheap, but not everyone wants to upgrade so a web browser can perform better. Chrome eats through RAM like a termite at a lumber factory. Unfortunately, Google's browser has been putting on some weight lately hey, I'm a fat guy, I didn't mind too much at first, but things have gotten out of hand. Not to mention, Google Chrome is technically the only way to get a modern version of Adobe flash working on Linux, thanks to its pepper flash implementation (damn you Adobe, for ending Linux development). True, Chrome is not entirely open source, and using it is a major faux pas for many Linux users, but I didn't care - open source be damned, I wanted the ease of use. Whenever I install Windows or a new Linux distribution, the first thing I would do is install Chrome.
It is available for most operating systems (not Windows Phone, sadly) and allows me to easily sync my activity across systems.
Google Chrome and I had a really great thing going.