BOSH knowledge isn't easy to come by unfortunately and I don't think the problem is HA for the foundational components so much as there being so many foundational components.
Look at a HA Kubernetes cluster. You've got kubelets and 2-3 masters and you're done. Look at CF and you need 22 servers total just to get started.
It may be easier/cheaper to use a hosted service compared to setting up your own CloudFoundry cluster but it's still extremely expensive and doesn't compete with alternatives like hosted Kubernetes. Say I want 32GB total of apps with 8 CPUs for a few development environments. For CF I pay ~$1600, for Pivotal I pay ~$700, for self hosted Kubernetes I pay ~$400 (4x8GB DigitalOcean instances + 3x2GB for masters) and for managed Kubernetes I pay ~$205 (4x n1-standard-2 Google Compute Engine instances + free cluster management since under 6 nodes).
I'm not sure it's apples to oranges, though. Out of the box Kubernetes provides some, but not all, of what Cloud Foundry provides.
When you say "so many foundational components", you're right: CF is featuresome and opinionated. That's the whole idea. With Kubernetes you can absolutely assemble all the other parts yourself and wire them together to taste, but that will chew up some of your 32Gb. And our calculations should expand to include engineering time, which is, last time I checked, quite expensive.
I'll definitely give Google due credit for competitive pricing though. For that price, and given their expertise, it'd be silly to self-host Kubernetes if you could use GCP.
Look at a HA Kubernetes cluster. You've got kubelets and 2-3 masters and you're done. Look at CF and you need 22 servers total just to get started.
It may be easier/cheaper to use a hosted service compared to setting up your own CloudFoundry cluster but it's still extremely expensive and doesn't compete with alternatives like hosted Kubernetes. Say I want 32GB total of apps with 8 CPUs for a few development environments. For CF I pay ~$1600, for Pivotal I pay ~$700, for self hosted Kubernetes I pay ~$400 (4x8GB DigitalOcean instances + 3x2GB for masters) and for managed Kubernetes I pay ~$205 (4x n1-standard-2 Google Compute Engine instances + free cluster management since under 6 nodes).