These clones are often written in unimaginably inefficient languages like Ruby or Python. If I’m not mistaken, Twitter uses Scala. That would have been a good

These clones are often written in unimaginably inefficient languages like Ruby or Python. If I’m not mistaken, Twitter uses Scala. That would have been a good start. For all the indie-ness, one of these clones could have been written in hand-tuned Rust or C# or Kotlin to respect the resources of people who would run them out of their own pocket. But sadly this has not happened yet.