Laminar flow aerofoils work well on most jet aircraft. The design problem is, how much does it cost to have a wing with even more laminar flow? The nature of air is that it prefers not to adhere to the rear section of a wing (or any surface) aft of maximum thickness unless the designer gives it some encouragement. Shape it the vital feature used in most designs. Anything else requires complex engineering and/or large amounts a energy to run. A glider pilot can justify the cost of increased laminar airflow but an airline operator will have to stick to the 40% or so they get as standard. Currently, there is unlikely to be an economic payback if more of the wing remains laminar. But if the price of fuel continues to increase, that may well change.
PM