Does a new library need to be backwards compatible?

[mingness]

As I understand, Processing 4 was built with Java 17.
Previous templates declare a sourceCompatibility of Java 8.
The current template is using the recommended toolchain to define Java 17, which automatically sets the source and target compatibility to the same version.

[SableRaf]

It's ok to make this template compatible with Processing 4 and newer versions. The instructions and tools for creating libraries for Processing 3 and earlier will still available for anyone who needs them.

[mingness]

Thanks! I'll close this issue then.