Facegen was generating avatars with less details than what would be expected nowadays.
And it was not an open source technology.
People making Free Open Source Software were more inclined in developing tools like Makehuman to allow people to create characters able to be avatars or pure inspiration.
There was an attempt to integrated photogrammetry tools, some years ago.
Taking into account a lot more details than what facegen was doing.
2.8 refactor impacted the project.
And as Toka said, Mesh Room alternative showed up and become popular.
There are free open source alternatives to Mesh Room.
Regard3D is a simple to use without nodes.
Colmap is more rough to use. But it is GPU accelerated.