Isn't the promise of k8s a kind of dev-friendly serverless-compute engine, but your process(es)/architecture may be running for moments, days, weeks, or years,

Isn't the promise of k8s a kind of dev-friendly serverless-compute engine, but your process(es)/architecture may be running for moments, days, weeks, or years, and spread across environments dynamically? I would expect aspects of such a thing to require tweaking and babysitting, as the demands of the application(s) evolve.