Every popular webapp can be easily made with PHP and hosted in a bedroom, prove me wrong. We don't even need backend solutions like containers or kubernetes, companies have definitely wasted time investigating these technologies and putting money into them.
We definitely don't need containers or kubernetes. Netflix wasted so much time and energy with the whole microservices nonsense while pornhub serves more video in more locations purely using PHP servers.
Kubernetes is supposed to make these things easier, and it very much can (and do for many). Containers are great, microservices on the other hand just seems like a way to decouple things so nothing can be verified AOT