I see their value as a tool but personally i would not grow them as i don't enjoy smoking them. Nevil knew my stance on most of the Dutch genetics.
You can find NL every were even in Jamaica but you cant find good quality sativas that easy.
I also disagree with you on this one.
99% of the NL's are just watered down inbred dutch garbage. Good quality Northern lights/Hashplants/Afghans are rare to find these days.
Shitty Pollen chuckers/Breeders with shitty breeding techniques F'ed up the quality in the gene pool.
I agree with you on the Jamaican weed scene, they went down hill once the euro seeds came in. I can still remember smoking some shitty brown sativa buds from Jamaica that blew my mind.