Shouldn't systems Like LZB or ETCS bei mostly protected against radio interference as only the Last section (centimeters) needs to bei transmitted wirelessly? Are they used in the line or did they opt for something else?
By my understanding the RCE part of the exploit should not apply to recent java versions if the default options are used (minecraft shipped older version afaik, and all bets are off for unmaintained enterprise applications).
The data extraction however will work on any java version if the server in question has the capability to connect to a server under the control of an attacker, as the network request will be performed even if the JVM options that should avoid the RCE are enabled. Big problem for client applications (as usually most outgoing connections are allowed).
A bit harder to evaluate the impact in the enterprise context as many companies will not allow their servers to connect to "random" endpoints or at least require target-specific proxies to connect to the internet/intranet which makes this harder to exploit.
https://www.postgresql.org/docs/current/storage-hot.html