I'm a late-comer to Sonoma because my primary Mac, a 2017 iMac, could not be upgraded from Ventura. My brand new Mac mini M2 Pro has "blessed" me with Sonoma. The quotation marks reflect the numerous speed bumps I've encountered with the many enhancements to my Mac environment.
The one remaining bump is finding a replacement for SmallCubed's Mail Act-On plugin. I'd been thinking I could do something with Keyboard Maestro. @ikenassi, I'm thrilled to discover you've beat me to it!
Are there instructions on installing and configuring MailFolder? For example, which of KM's two File > Import actions should I use to import the MailFolder library?
I'm also hoping other Mail Act-On users can offer advice on the transition to MailFolder.