tldr: Timing is important when launching a product, there are a few indicators (he calls "tests") that timing might be good:

- Nerds use it a lot

- People use the product despite it sucks

- People wear t-shirts of the product/brand

- Most people don't undertand why this product is important although it's obvious to you

For me, these are also truism (as he rightfully calls "product market fit" one in the beginning of the article). I'm not sure if this is actionable or even good advice for entrepreneurs...

Edit: Styling.