[aeriklawson]

> I manage dozens of apps for thousands of users. The apps are all on one server, its load average around 0.1.

If you're at this scale you can do whatever you want. Most of the stuff I've made has been with simple building blocks like you've described, maybe thrown in with some caches and a load balancer.

Although I've worked with other teams who really did have the high scale request flows that require you think about using a different architecture. Even so, K8s is not the end game and you can make something work even just extending the LAMP stack.