As mentioned in that thread, one approach would be to rip out the private APIs and everything that depends on them.
I expect the immediate effects would be a far less pretty Quicksilver, as these seem to be primarily used for animations. However, it should help avoid fiascos like the current (long) list of Sonoma issues.
Quicksilver currently relies on private APIs, primarily for its animations.
These are extremely difficult to debug and maintain as they are undocumented. For example: https://github.com/quicksilver/Quicksilver/issues/2962
As mentioned in that thread, one approach would be to rip out the private APIs and everything that depends on them.
I expect the immediate effects would be a far less pretty Quicksilver, as these seem to be primarily used for animations. However, it should help avoid fiascos like the current (long) list of Sonoma issues.