We are still on Java 8 and we should go at least to 11 to use some interesting Java features. But we don't jump to 21 or the latest LTS because RestFB should work for most users.

https://sdtimes.com/softwaredev/report-java-17-is-now-the-most-used-version-of-java-in-production/