2019 update: New article out of the owen:

During my 3 months stay in the US, one of my pet project was to download all of the posts on medium.com. It took around 1 week to write the script, and another 1 week to download all of the posts.

The total database size is 8GB. I ended up with 6M posts, having a total of 9.2M total tags. Counting the unique tags, we end up with 620K tags.

I ended up filtering and extracting just the stats for the tags that are used in at least 1000 different posts.

There are 1016 unique tags that are used in at least 1000 posts.