Unimplemented Functions? Main_thread errors? metadata.self errors?

For Gran Turismo, Burnout Paradise (There's a PC version) or anything as demanding like those wont run in near future. For anything like that I'd say to expect a wait of couple years. There are many many unimplemented functions and if you have good knowledge of C++ and have it in you to work with a big spaghetti pile you can go out and implement those. And almost all of these problems are known.