The idea that they couldn't grab $40 for a monitor adapter was unpalatable. Besides, everyone who had a Thunderbolt-equipped display was overdue for an upgrade but they "thoughtfully" offered a T-3 to T-2 adapter for $49.Maybe four years ago, now it's all Thunderbolt 3 via the USB Type-C connector.
For a company that talks a whole lot about things being elegant and well thought out, they do love their adapters and converters. Their solution to a conventional USB port is what, $69? Ever try to replace one of these things in a hurry?