It is also often (wrongly) attributed to Winston Churchill, who was a Conservative at 25, a Liberal from about age 30 until 50 and was one of the people responsible for starting that parties switch from economic liberalism (similar to libertarian-capitalism) to social liberalism (what the US calls liberal now)
I’m just past 35, and have gone from the left wing of Labour when I was in my teens, to just about on the parliamentary side of the anarcho-communist borderline.
Some days I really question whether I shouldn’t be crossing that line though.