Handbuch S. 864:
Lower Simulation Update Rate
This experimental option allows reducing the update rate of the majority
of the planes components.
Doing so may reduce the stress on the CPU, improving game
performance for machines that are bottlenecked by their CPU.
However, it can also result in not only visual cuts, such as animations
running slower, but will also cause some systems to degrade. For example
the Pave Spike, running slower, can not update its ground stabilization
algorithm fast enough anymore. So ticking this option can cause issues
and lead to bugs.