Wouldn't the big advantage of GMO trees be ones that grow in non-boreal regions? But I gather genetic engineering for most tree species is limited by the slow r

Wouldn't the big advantage of GMO trees be ones that grow in non-boreal regions? But I gather genetic engineering for most tree species is limited by the slow reproductive cycle (oak trees take 40 years to produce acorns, and they're not even close to the slowest to reach maturity).