Improvements to custom block geometry and add-on templates. PaperMC for High Performance
This update, released in late 2022, brought several quality-of-life improvements:
Essential for the application to execute correctly on Windows 10.
These videos provide detailed walkthroughs of the 1.19.40 features and how to set up Paper servers for performance:
Mobs no longer spawn within the boundaries of an Ancient City, making exploration safer.