[whatcanthisbee]

For south koreans, it's all about "can I go to gangnam within 1 hour?"

Most jobs, private tutors for kids, etc - are near/inside gangnam.

Any improvements for this metric (eg. a high-speed train) will fix the issue in no time

See "Gwanggyo new town" for example. It was a ghost-town until "new-bundang-line" (a high-speed train disguised as subway) made the trip to gangnam less than 40 min.

[bri3d]

The HK New Towns all evolved in this direction as well, to the point that sustainable local industry as envisioned in the initial New Town concept tends to be reduced in favor of bigger rail links to Kowloon and the island.