Approximately one per minute in the 15 minute span proceeding this crash, including one that had an emergency takeoff rejection and was being maneuvered along with the emergency support vehicles that were being sent to attend to it

>> One controller overnight is completely reasonable

So if said controller has a medical episode?

Can a single human being reliably and robustly maintain a safety-critical system alone under any circumstances, ever?

Ever?

Normally? Zero. LGA has a curfew from midnight to six AM, April 5-December 31.

In practice? It depends. Delays have a tendency to cascade in the air travel system and the Port Authority can curtail or cancel the curfew at their discretion. How frequently do exceptions to normal ops have to happen for it to be unreasonable to use "normal ops traffic" as a justification for scheduling a single controller? Ultimately, controllers have to control the traffic that they get, not the traffic that they want/expect to get, and a system that is overly optimized becomes brittle and unable to deal with exceptions to the norm.

Looking at the things he needs to juggle at the same time, is it really reasonable? Any standard we are referring here? Sure such cases are rare but that's why we have redundancies for critical positions.

> One controller overnight is completely reasonable.

How many fatal accidents are reasonable in your opinion?

> One controller overnight is completely reasonable.

Do you really think it's appropriate to have zero margin for handling unusually high ATC workloads? Because we just saw what happens when you have zero margin for handling unusually high ATC workloads: people start dying.