The NYTimes announced that it will join the Associated Press this week to change their style rule to lowercase the word "internet."
As noted, "while most publications capitalized the word when it first came into widespread use, the lowercase form has become steadily more common in recent years."
Changes like these provide insight into how style and usage can change over time:
More broadly, modern usage tends to favor less capitalization — along with fewer hyphens and less punctuation in general. Capitalizing words when it isn’t strictly necessary can seem archaic to contemporary readers. The Times used to capitalize “Federal” in phrases like “a Federal judge,” and even “Government” when referring to the national government. Now both of those uses would be lowercase under our rules.
Click the link to purchase the full NYTimes style & usage manual.