Comment by avabuildsdata

The unfair scheduling point resonates. I run a lot of concurrent HTTP workloads in Go (scraping, data pipelines) and the scheduler is honestly fine for throughput-oriented work where you don't care about tail latency. But the moment you need consistent response times under load it becomes a real problem. GOMAXPROCS tuning and runtime.LockOSThread help in narrow cases but they're band-aids. The lack of priority or fairness knobs is a deliberate design choice but it does push certain workloads toward other runtimes.