This was our biggest hesitation when we were first evaluating the idea - we thought companies want to either "outsource" devops completely by using something like Heroku, or hire a devops engineer to do the devops work, obviating the need for a platform like this.
However, we were surprised to find that a lot of our users actually fall in the middle - they want to run things in their own cloud, but don't want to deal with the complexity of k8s. Perhaps the biggest change in the last 3 years is that k8s became a popular option even for startups - adoption of k8s has been "trickling down" and now the k8s user base is increasingly composed of those who "know the basics of k8s, but don't want to deal with all of its complexity". We've found that a platform like Porter fits in with that type of demographic, and we are optimistic that there are more of these companies based on our current data.