I tried to signup in Medium. Sadly, it will allow only if I use a Facebook or Gmail account. Not through an email as we do on a normal website. I said goodbye to it and moved on.
But Medium is very popular. I get a lot of informative content through it. Many pro authors, mostly corporate representatives write on it. I find that the content is better cooked in Medium than other platforms.
Even Microsoft chose Medium to explain their Fluent Design system. Do you use Medium ? Happy with it ?