Is it possible to fly 85 hours a month for 30 years and still loose your pilot skills and a good chunk of airmanship?...absolutely.
Yeah...I see lots of guys do Barber pole descents into turbulent air. Cloud reading skills have long attrophied.
340 kts moderate turbulence and what do they do? They pull the Speedbrakes full aft! Ooooo nicely done. 10000 hours in the plane and that's the best solution they come up with?
Yeah....still in the envelope. "U" in judgement. Always better to plan your work and work your plan.
No offense...I've ceased being impressed by high time pilots long ago.