100% lack of interest. There's been like 5 people total in the og xbox emu scene in the last 10 years, one of them didn't even do any actual work besides getting mad in reddit comments (jayfoxrox) and another put all his effort into working on an hle/binary translation emulator which by definition cannot work with half the library of games as xbox api and dx api calls are inlined in those games.
Matt really saved the day when he started up xemu from xqemu. It was advancing by leaps and bounds there for a while but has slowed down once again over the last year. I'm hoping it picks up steam once again.
