This change isn’t about introducing any fixes, updates, or features to the emulator itself;
is talking about the change between version 5.0-21811 and 2407. I’ve updated the post to be clearer.
Dolphin have made huge strides in GameCube/Wii emulation since the 5.0 release, and I think they’ve done themselves a disservice by not highlighting these significant achievements through major version number releases.