Hello,
I was getting significant stutters there (quite unable to takeoff or land) and find that JoinFS was tracking those 2486 wind turbines (and probably overloading SimConnect when periodically querying objects details).
As JoinFS source code is now available, I edited my copy to only track “flying objects”. This completely eliminates the stutters as you can see here.
I guess other programs may enumerate and periodically (and abusively) query data via SimConnect about “non moving” objects. The flight simulator and the eventual additional scenery are not the issue.
Take care that trucks, follow me and some others… are injected by some addons… and that could cause stutters in the vicinity of large airports 