I think I have more than 40 external runtimes. Each figure has their own, actually, each figure has one for character addons and one for clothing. Plus I have one for each theme (angels/faeries, plants, backgrounds/environments, mermaids, christmas, valentines, lighting, props, hair etc). It makes life so much easier knowing where exactly things are stored. Yes I have to switch runtimes a lot, but it's worth not having to play seek and find when looking for things. And it makes deleting things so much easier because I don't have to wade through non related stuff looking for the files.

"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