People are having the same issue I am
"People" ? You open the thread, and you post most of the messages there.
Another user, Regis9 said, on the same thread:
I had some pauses (it was a known issue) with the early versions of KMEM, but that has all been fixed by the last few updates.
Another user skwaL said, on the same thread:
Make sure that you guys get the latest updates for it. Mine did it before updates, right now runs just fine.
There are, in fact, TWO other users, who still say they have the pauses so, what you can see on that thread, is that 2 users said the update COMPLETELY fixed their pauses, and 2 other user saying it didn't.
One of them use FSX so, I'm afraid there's just nothing we can do that, because the update fixed the problem by using native P3D ground polygons, which removes the needs to do additional processing to prevent flickering and STILL being able to use FSX native materials at least.
So, your first question should be, why the pauses were entirely gone for those two ? It should be fairly obvious that, if the airport still had a problem, everyone would get pauses.
It might just too many addons running together and stressing Simconnect, which everybody needs to rely on in order to talk with the sim. Addons that put a great stress on Simconnect are, for example, weather engines, but even a complex airplane might do the same. So, a reason why you still have stuttering and several uses (both here an on Avsim) posted they don't have it anymore after the update, it might simply be your installation has simply too many addons for the sim to keep it up, while they are not running some of the more taxiing ones.
What the update did, using the P3D native ground polygons, was REDUCE the need to use Simconnect to connect to the sim and the frequency/quantity of commands issued, but still the scenery still needs to do some communication with it so, if you have other addons that are already taking up all the communication bandwidth, there's still not much time left for us to communicate with the sim, so we lag behind.
That's seems to be the most likely issue you might having, which explains why others don't have it.
But that might not be the only one. The sim Affinity Mask setting might have an impact on this, so the multithreaded execution of all process might not work a smoothly as it could be.
Try to remove the AffinityMask from the Prepar3D.CFG file altogether, and see if you have any difference.