The other part to consider is how much HKG has become the main gateway to Asia and China. Its incredible to see the flexibility of flying through HKG instead of other airports in the area and since it is truly an international airport to begin with.

Moving to locations such as Macau, Guangzhou or even Shenzen will serve only to be an annoyance since for pax like me, HKG seems to be the prime spot to take a break before continuing my journey elsewhere.

Another thing to consider is that HKG is what to SIN is to Singapore. In an essence, the pax traffic through HKG is because of its strategic position. Then again, people can argue that all the other airports in the peninsula might be more strategic than HKG, but HK is also a prime destination for both business and tourism.

Yet HKG is also the hub of international business, and its going to be more than nagging for someone having to be diverted to some other airport than HKG due to runway /airspace shortage. Besides, doesn't HK economy depends on HKG, its ports, and its international business hubs? You can't take one away and expects the others to excel can't you?