Approach for Regional Airports

[The name is Porter]

Why should it? That thing has EGPWS and RNP-AR (or at least a VNAV/FMS) approach. What's the point? Are you going to install traffic lights at every intersection? If there are no other aeroplanes about, we don't need ATC. AIR TRAFFIC CONTROL. This is the 21st century. Operators using on-board technology to reduce their costs/keep their safety levels up. Why would you want to put in a costly 1950s "we're watching over you" ATC system?

There you all go again, 'fark GA.' First, not all aircraft have onboard the systems you allude to. Second, the ATC is on duty, monitoring the airspace anyway. It's not like the airspace is deactivated with no one there. I would sit and watch the approach on radar, why not provide an approach service?

Yes, it's the 21st century in a supposedly developed nation. Yet approach is shut down for the night.

Surely the only argument for an approach service can be made in the name of collision risk, and only then when air traffic is dense?

Why? How about a collision with terrain? I can quote you a number of incidents where an aircraft has descended too early on an approach and the controllers has picked it up

[alphacentauri]

Porter,

And I can quote you incidents where the approach controller has not....