No disrespect to the author but I'm sorry, it's dead for all intents and purposes. No one should consider it for new projects and existing projects should be looking for the exit.

Heroku is not dead, it's changing.

Mmk, changing into something no one should use. They were struggling to keep up before the Salesforce acquisition and have only gone further down hill after that.

There was a time that Heroku was king, it was so easy to get started, and while it was always expensive, at least it was cutting edge. Then they lost that edge and many other, better, alternatives took their place (this was pre-acquisition).

At best Heroku is in maintenance mode at this point (if that).