The larger your runtime the longer it will take Poser to start up.

If you have one runtime, then it must be huge. If you have several external runtimes, then each runtime is smaller, so Poser will start up quicker if the last runtime that was used is small.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi