When creating a WordPress theme it's easy to go overboard on the amount of features. To an end-user, more features seems like a better deal and more incentive to purchase. The issue is that many themes abuse this to promote sales and you end up with a bloated and slow site that ranks poorly and suffers usability issues. Many frameworks also suffer from either the lack of ability to expand on existing components (such as shortcodes and options), or allow this but require that all base styles are imported, excessively increasing theme size.
What We Accomplished
By dequeuing the default stylesheets and scripts included with many plugins and providing proprietary scripts, Etch is able to further reducing the total overhead by another 500kb and shave seconds off of load time.