At $CURJOB, we have built a pretty good business on an app built in Java. We don't use Spring, but instead a lightweight MVC of our own creation[0]. It is open source but I don't know if anyone else is using it :) .
I once asked the founders why they chose java; it was because it was 2015ish and they had an existing product in java and they knew it. Which makes sense to me. I think there's a lot of path dependence to language choice.
I also think the domain matters. For database based webapps, Java can be great. Lots of tooling and knowledge around it. And modern java is pretty friendly to write. Plus, if you are interacting with something over an API and deploying it via a container, who really cares what it is written in?
For kubernetes operators? Seems like a natural fit for golang. Anything kube really. I had a friend who ran a k8s consultancy for a while and said that they'd prototype stuff in python because it was easy, then implement in golang because that was what was consistent with the rest of the ecosystem.
I once asked the founders why they chose java; it was because it was 2015ish and they had an existing product in java and they knew it. Which makes sense to me. I think there's a lot of path dependence to language choice.
I also think the domain matters. For database based webapps, Java can be great. Lots of tooling and knowledge around it. And modern java is pretty friendly to write. Plus, if you are interacting with something over an API and deploying it via a container, who really cares what it is written in?
For kubernetes operators? Seems like a natural fit for golang. Anything kube really. I had a friend who ran a k8s consultancy for a while and said that they'd prototype stuff in python because it was easy, then implement in golang because that was what was consistent with the rest of the ecosystem.
0: https://github.com/prime-framework/prime-mvc