It doesn't have better resiliency, when you just need more RAM than it can offer at reasonable cost. I mean a comparable VPS is more than an order of magnitude

It doesn't have better resiliency, when you just need more RAM than it can offer at reasonable cost. I mean a comparable VPS is more than an order of magnitude cheaper. It is not the best advice to burn money on infrastructure, if you don't need to. Yes, start on Heroku and get some users first. Migrate to something else as soon as you cross the $50 mark or so, you will get much better performance and most likely stability for the same money. Most companies I know wouldn't really profit from k8s much if at all. A handful of VPS's setup half automatically using Ansible and a few clicks will be probably just enough. You will know, when you need to scale out to many servers when k8s is probably the better approach. You will probably have people doing just that full time at that point.