I think that for the average user, problems are pretty much solved.
And that would have been the internal moisture problem in extremely humid environments.
The extreme temperature thermal drift issues are probably always going to be present.
AKA....Temperatures shifting from average to "minus 40 F" and to 120+ Degrees F.
Going from memory here but, those extreme temp changes resulted in what was termed Thermal Drift which could have decently disastrous results in parts of the world where our troops were engaged in battle.
My information goes back a ways so....maybe some member could give them a call and get some specific information as to exactly what improvements have been made or what exact issues have been corrected and post that information here in your thread.