Twitter was the primary medium connecting the President with the people who believed that thy were doing "the capitol hill thing" at his behest. Whether that was his intention or not, Twitter carried messages directly from the President to people who acted on them.

Twitter was without a doubt important. It wasn't the sole player, to be sure, but they were a direct intermediary between a prominent leader and his followers, bypassing all other gatekeepers.

Perhaps he'd have switched to an email newsletter or Facebook or another social medium, but in the days leading up to January 6, it was very much about Twitter.