I used to live in London at a time when the fact that mushrooms were technically legal seemed to suddenly come to light. Oxford street was full of places selling them, as were various markets. There was lots of branding and marketing that appeared as if from nowhere.

Honestly the kind of overnight switch from not being visible anywhere, to seeming to be on every street corner reminds me of being in SF when Lime and the other scooter startups blanketed the city seemingly overnight.