Why was Multi-threading removed?

[Tabris666]

why they removed multi threading since worked fine,now the emulator barelly works on pc or gaming tablets.
sad to see this emulator going downhill is similar to the time dolphin emulator got took over by other developers and they started to break the emu because they didnt want a working emulator for low end or middle end systems they wanted to claim "we have powerfull pcs if the emu run slow buy a new pc since yours is sh*t" and removed several features because they claimed those features didnt work or break several games instead of improving the features (henrik when the native save is going to get fixed i have been waiting 8 years since you broke the saves for several games just because those save broke the snapshot save) for example multi threading was a good option and helped in several games specially on tablets and pc for games like tekken,ryu ga gototoku,one piece and other games.