The argument - as I understood it knowing only little about Go and Kubernetes - wasn't about bloat in application features, but bloat caused by the language. The stated argument was "missing generics" - missing generics means that similar algorithms have to be re-created multiple times instead of being reused. Thus comparing this tonnaother language might be interesting.

For example C++ is extremely powerful in writing generic code: Make it a template and and provide a set of of traits to modify the behavior and you get a set of algorithms you can re-use for anything – at the cost of unreadable code in the impelemntation (if you aren't careful; with a chance of quite precise code on the call side) and of course with the bloated version in the resulting binary (after compiler instantiated and inlined (thus copied) everything; where the programmer typically doesn't have to care (till the binary is too large to handle) all of it)

So the better question ist ... What code got duplicated exactly and if the one mentioning can't give examples which make a dent in 2MLOC then it is not due to the language in the first place.

I assumed it is about features because there are really a lot of features inside Kubernetes which are not available in Swarm or Nomad by default.