Indeed, had it not been for Oracle's work and Java would have been stuck at version 6, Maxime would never been made into GraalVM, all AOT compilers for Java would still be only available via commercial JDK, (almost) zero pause GC with support for TB heaps, JNI replacement, support for SIMD/AVX512, incoming support for value types and rewrite of C++ stuff into Java would never have happened.

People like to talk and bash Oracle, but no one else, including Google bothered with Sun assets, and the community on their own would never made the improvements that Oracle has made in the last 15 years, if the way of Python and Ruby are any indication of how runtime improvements get made.