Of course, Node.js can also do this with pkg, and also I don't know whether executables produced this way really are dependency-free (although depending only on widely-available shared libraries would be almost as good).
It's not. Most advanced deployments nowadays use container orchestration where deploying is as easy. For simple deployments (eg SSGs) there're enough products on the market.
Integrating the build step hides it at the same time (good for beginners) but creates many other problems in the long run if we just talk about repackaging the run-time.
(For the record, I am a proponent of things like containerization and serverless, and generally try to bring them into use wherever I can. This doesn't require me to ignore the reality that lots of places don't use them, and that this will remain true for a long time to come.)
Maybe a decade ago, tbf IDK anyone who deploys like this in 2020, people user either Docker and/or k8s or a stupid-simple netlify/surge/vercel push. Then, there's also server-less stuff but yeah, you get the idea.