I suggest you calm down and go easy on our friend. This is not his fault. And btw, in my opinion Nougat proved us wrong because it's more compatible than Marshmallow with S4 I9500.I can learn and cook ROM iam already IT and I am welling to learn new things but why what is the purpose and how far will get the project. For a device 5 years old and he is already bleeding so I will work hard for nothing. I wish for ur ROM to be the perfect ROM and I will be the first to use it. But example u can't work with the source to fix issues. Is the source is fixed then all the ROM that depend on it will be bugs free.
P.s. I think our device last update can get is Marshmallow 6.x with custom ROM
And once again I will thank u for ur efforts and I can't say other than that and I hope u will get my point this time.
Edit: just one last thing before this device I Owend Nokia n900 it was the last perfect device from Nokia and there is a port for android 2.3 gingerbread dual boot with maemo but he didn't got far from 2.3 without sim and data and bugy.
Less issues and almost stable.