Not to sound like a judgmental and experienced jerk back but how many container orchestration systems have you built and run in production? Since I have first hand experience in building, hacking, and working around all the limitation of a few such systems deployed into production environments I think I know all there is to know about RancherOS.
By all means continue to run RancherOS and let me know how that goes when you're managing a few hundred to maybe upwards of a thousand VMs and then layering a container orchestration system with the underlying VMs coming and going on an on-demand basis. I remember thinking "I really wish I had more of this docker stuff in the OS itself. Because dealing with all the caching, volume mounting, and instability in userspace is so much fun".
I'll await your report because clearly my experience with these systems and all the ways they fail is too combative for your taste. There are a few things they don't tell you on the brochure when you're drinking the kool-aid.
