> All those things are true of Java/Kotlin, except even moreso.
The parent did mention:
> ...and is simple to deploy.
Also, my experience with Java programs is that the memory overhead is even higher than Go (where it's a ~2x of what the program holds as heap due to the GOGC=100 default).
It's not harder to deploy in my experience. When people say this they tend to imagine deployment as "scp binary user@host". Well,
./gradlew installDist # build the app for deployment
rsync -avz --delete build/install/my-app/ user@host:my-app/
Just repeat to upload new versions. rsync vs scp isn't harder and the Java version will be faster (incremental). If the host doesn't have a JVM installed, ok... apt-get install one and your distro will keep it up to date. One command.
But in reality most software isn't deployed by copying binaries around. You'd want it to be at minimum run by systemd or kubernetes, for example. And if you want a Docker container then it's pretty easy. Your framework probably configures it out of the box:
./gradlew dockerBuild
Push to the host and start it up.
The reason it's not harder in the end is that the above takes cares of many annoying details that crop up in real deployment, like knowing what CPU and CPU extensions does the host have? Can you deploy incrementally without recopying the whole thing or does that not matter?
The above is for servers, but it's not really harder for CLI tools either. Fat JARs exist. If the user doesn't have a JVM, once again, they can install one easily from their package manager and then it's done - no need to create and distribute half a dozen binaries for all the different OS and CPU combinations that are out there.
But if you want to make AOT compiled binaries and get lower memory usage too, there is GraalVM which can do both. You've got the choice.
Note how the above debate isn't changed by AI in any way. Their weaknesses remain weaknesses, their strengths remain strengths. I wouldn't personally use Go because of its poor feature set and debugging support (errors don't reliably create stack traces). But the arrival of LLMs changes nothing about these preferences and choices. At most you can talk about token efficiency, in theory, but the attempts to measure the real world impact of that don't seem to have yielded decisive evidence.
> And compared to Go, the production observability is very good.
Can you give some examples where Go is lacking and Java is great? (Ideally builtin things, and if not builtin, then things where Go doesn't have an externally developed alternative).
> I also use Clojure and can observe my running app with a full REPL.
Does this work with other JVM languages, like Java, too?
Clojure can to some extent help you get a full/true REPL into Java and any JVM language, but only to some extent. You'll have to use Clojure to get the full observability and program runtime-mutability.
The parent did mention:
> ...and is simple to deploy.
Also, my experience with Java programs is that the memory overhead is even higher than Go (where it's a ~2x of what the program holds as heap due to the GOGC=100 default).