Why was Multi-threading removed?

[LunaMoo]

Post process shaders works fine in any backend here(except d3d9 where it was never worth supporting them and the option was hidden. If you have different experience, that's probably a device specific problem, limited to your device which nobody else knows about.

As an ocassional contributor - thanks for the compliment, Dolphin is considered by many most complete emulator with one of the most competent team which is never submitting to pressure coming from haters whenever unpopular work has to be done for the sake of wider picture.