CLAP is an open source plug-in format that first appeared a few years ago.
It hasn’t been officially released, but guys from U-HE are pushing it in their installers.
The main reason for the standard is that it’s liberally licensed (i.e. no fees, lawsuits, etc.)
Another reason is (allegedly) its stability.
- pure C ABI
- it will also allow for host controlled multithreading.