We also have a great palm here, a true Giant, Borassus flabelifer, the Lontar palm. It takes 15 years to start production but continues for a very long time. its taproot is very strong and it can be planted on hilltops where little else grows. The seeds are planted directly.
Ive seen many in Cambodia as well
the seed is edible and the palm is tapped for sugar . its a long term crop but easy to establish and gives intergenerational equity
while its been forgotten, in a a future world with bioethanol fuel cells it may yet come back