[cupcakestand]

Why should I discover content on Medium?

This job is done by HN and Reddit and unfortunately Facebook if I am on FB. I don't have time to get sucked in another feed.

[corobo]

Specific content. For example I follow the Laravel tag on medium, I've not seen anything regarding Laravel on HN in a fair while.

[ben_jones]

Because most aggregators become biased and limited silos either intentionally to sell advertising or otherwise via community moderation, power users, etc. The same stuff always bubbles to the top or is buried at the bottom. Variety is key.