Blog: subdomain of a folder?

I was always wondering is there any real SEO difference between hosting your blog in a subdomain or in a folder. It turns out putting a blog in a folder is a better choice.

I asked Andrea this question and he recommended me to dig this Twitter thread where I instantly found why using folder is preferable :smile:
https://twitter.com/randfish/status/974011592902770688?s=21

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