Because Vaxry (the lead dev) got banned from contributing to wlroots or any other FDO projects.

As for why he was banned, this is the only thing I’ve read about the whole thing: https://drewdevault.com/2024/04/09/2024-04-09-FDO-conduct-enforcement.html

Basically, he violated the FDO Code of Conduct when being told that a particular thing he said/enabled in a Discord community would not be acceptable if it was seen in spaces covered by said CoC.

This appears to be his response.