ReactOS making progress on SMP/multi-core support
ReactOS as the open-source project striving for binary compatibility with Windows applications/drivers is still working away in 2022 on symmetric multi-processing (SMP) support.
Proper SMP/multi-core support is obviously critical for today's hardware or even anything in the past roughly two decades... It's also been a pain point for ReactOS, but fortunately the situation is improving.
We're still looking at very early code that's not even merged yet, but once it has - this would be a massive leap forward for the project.