[rubber_duck]

I agree but I don't understand how that relates to Dart (has a standalone VM of decent quality) or Mojo (IPC API language - basically abstracts stuff on a OS process level - cross language/VM/process interop being transparent)

[awinter-py]

Both great products with great technology but neither is ubiquitous. JVM & javascript have pentrated their target audience enough that 'building on top' saves your users some installation work.