Emulator

Something I've noticed in recent years is that the SyncGPU option is rather lackluster. Due to how Dolphin has been evolving over the years, there isn't really a great usecase for SyncGPU. For stuff like netplay, we have Deterministic GPU and single core. If you want accuracy? Single Core is outright better than SyncGPU.

Performance wise, while SyncGPU can theoretically be faster than Single Core, it suffers from lots of stutters and hitches that aren't present in Single Core. There's also many cases where SyncGPU is outright slower, buggier, or unstable compared to SyncGPU in games that require stability.

Our Fifo code is extremely complicated right now with tons of paths, and it's probably where a lot of the remaining bugs and timing issues in Dolphin remain. By removing one of the paths, we could greatly simplify the codebase to make potential improvements easier while lowering the amount of testing that would need to be done on timing changes.

By removing the SyncGPU option, we would still use GPU timings on single core. Dualcore, on the other hand, would remain dualcore. And DeterministicDualcore for Netplay would be unaffected.