Isn’t restic better for backups overall?

Anyone have a good script for macOS triggered by launchd, ideally something that uses FSEvents to check for directory changes?

I use restic, too, and I am very pleased with it, although I run it on windows, which works, but isn't perfect. So, you use it regularly?

Yes, it is; among a few other great cross-platform FOSS tools that are built just for backups, and they do it really well. But most of them do periodic scans (as opposed to file change trigger-based backup runs, which I guess is what you might be looking for, I assume by your second sentence).