No Java Plugin? Now what?

Many systems, in particular various platforms offering a software KVM, have a Java-based UI for management. Often these provide a URL to download a "jnlp" file. These days Oracle et al have decided to remove this feature from the JRE package. Ref: https://unix.stackexchange.com/questions/639464/java-8-for-linux-x64-has-no-libnpjp2-so Ref: https://java.com/en/download/help/release_changes.html How is one supposed to launch these tools (not the least of which being the ILO UI of Oracle servers) without the Java plugin now?