From my experience the biggest PITA with switching to jdk 17 and beyond is the module system (jigsaw). Very few projects utilize this in practice and instead of

From my experience the biggest PITA with switching to jdk 17 and beyond is the module system (jigsaw). Very few projects utilize this in practice and instead of being a step forward it's a source of annoying runtime errors and typically results in a --add-opens mess on the command line too. Moving away from traditional JNI (especially with critical JNI natives) also complicates what used to quick and easy work. But at least Panama clearly comes with interop and compiler-level improvements. Jigsaw though... I can't even.