I too used to run a large clustered environment (VFX) and now work at a FAANG which has a "borg-like" scheduler.
K8s has a whole kit of parts which sound really grand when you are starting out on a new platform, but quickly become a pain when you actually start to implement it. I think thats the biggest problem, is by the time you've realised that actualy you don't need k8s, you've invested so much time into learning the sodding thing, its difficult to back out.
The other seductive thing is helm provides "AWS-like" features (ie fancy load balancing rules) that are hard to figure out unless you've dabbled with the underlying tech before (varnish/nginx/etc are daunting, so is storage and networking)
this tends to lead to utterly fucking stupid networking systems because unless you know better, that looks normal.
K8s has a whole kit of parts which sound really grand when you are starting out on a new platform, but quickly become a pain when you actually start to implement it. I think thats the biggest problem, is by the time you've realised that actualy you don't need k8s, you've invested so much time into learning the sodding thing, its difficult to back out.
The other seductive thing is helm provides "AWS-like" features (ie fancy load balancing rules) that are hard to figure out unless you've dabbled with the underlying tech before (varnish/nginx/etc are daunting, so is storage and networking)
this tends to lead to utterly fucking stupid networking systems because unless you know better, that looks normal.