the idea that this tirade is specific to "heavy users" is laughable. if anything, it applies more to light use than to heavy use. "mystery meat" navigation is generally a no-no, but the exception to that rule is in heavily used interfaces like email clients, where whatever is used will be memorized by all users incredibly quickly, and the removal of labels can actually streamline the interface.

the author doesn't make a single valid point regarding why the new interface is worse specifically for heavy users. its just a collection of negative reactions to change, like every other criticism since they introduced the new layout.