Being able to buy one of a half-dozen or more periodicals with informative commentary on an accessible programming language would be a mistake?
Empowering a generation of STEM learners with a basic programming language centered around the bedrock of computer science would be a mistake?
Safely and easily gaining first-hand experience with low-level hardware engineering principles would be a mistake?
Not PEEKing and POKEing in Primary school is a mistake.