not quantum computers per se but I had my aha moment when I saw quantum computing as "linear algebra with probability coefficients". It's mostly working on superpositioned qubits while doing the calculation and then making them (with linear transformations) as likely as possible to collapse on the solution (when "measured").
> Since 2016, the same colour has also been used for plain cigarette packaging in France, the United Kingdom, Israel, Norway, New Zealand, Slovenia, Saudi Arabia and Turkey.
I purchased a grand total of two packets before quitting 3 weeks ago, thanks colour science!