I used to be a fan of Heroku when I started working web apps... The deployments were so easy, but I became numb to the actual task of dealing with the complexities of a deployment, when they killed the free tier I struggled for a while... I work with Rails, and I used to bitch a lot about how hard it was to deploy an app, but in retrospective I kind of thank Salesforce for murdering their own product.

Now I deploy at my leisure with stuff like Dokku, or Kamal, directly on a 5 bucks VM on a fresh Linux box in 10 minutes flat. I wrote a nice web app that wraps around Dokku and manage the stack much in the same way I did before with Heroku... I'm much happier and I learned a ton on the way.