And not only that, Java came with portable standard libraries for pretty much everything: collections, threads, networking, GUI, database interface, etc, which

And not only that, Java came with portable standard libraries for pretty much everything: collections, threads, networking, GUI, database interface, etc, which are as much part of Java as the language itself: the Java runtime. C and C++ had some standard libs too, but nowhere near as many. So, it was not only that you could rely on your compiled code to be portable, you could rely on many crucial libs and dependencies being portable too, something which we may take for granted these days.