I can't be certain but it might have something to do with a combination of her RL work makeing her busy, low enthusiasm for the game compounded with being messaged by over entitled ingrate twits spewing hate.
If I was her I'd never even play the game again... I'm not sure the job thing is the main reason why she hasn't updated. I think she's honestly burnt out by a lot of bullshit.
Still, it would be better for her to release her project as open source so the work can continue. But TBH she doesn't really owe anyone anything, we did nothing but play the mod and constantly harry her for updates.