For example:
* Object storage: lots of horror stories out there regarding flakey performance so hard to justify sticking mission critical stuff there.
* Private networking: Again, too many anecdotes about loss of service. Lots of people just using the public IP6 interfaces to avoid their private networking entirely. And private networks are IP4 only.
* Kubernetes CSI: I've had issues with this where a PV gets in some locked state and I can't remove from console.
I'd love to see more competition here.