Round-robin is the ancestor of every time-sharing scheduler still in production, from early Unix to Windows' quantum-based dispatcher, and picking the quantum wrong is a real tuning problem: too short and context-switch overhead dominates (as seen in early VAX/VMS tuning guides), too long and interactive shells feel laggy. This task's turnaround/waiting/response metrics are exactly what tools like `perf sched` report when engineers diagnose scheduler fairness.