I was reading the Anki article on 2015-12-13, and the best prediction was by markm248 saying: "Remember that you read it here first, there will be a unicorn built on the concept of SRS"

They were right, Duolingo.

▲

mtlynch 3 days ago | parent [-]

Duolingo existed for a while at that point and was already valued at $500M by end of 2015.

	▲	GaggiX 3 days ago \| parent [-]
		It became a unicorn in December 2019 tho, 4 years later.