In my mind from the very first instant I saw one (late 1970's or early 80's Dick Ryan was interviewed on broadcast TV [likely as a novelty] and I was captivated. My child mind saw this as 'proper evolution' and I had to have one.
Here's a great summary of the history of the recumbent bike:
Some people are intimidated by change, others are energized by challenging the status quo. Those will always be my heroes.