Slugs are just dry land pest snails. They're just as charming. We have an invasive European land snail here, the 'corpse snail'. As invasives, they breed like mad and walking in some areas has a crunchy sound. I don't welcome them.
We have a Christmas cactus that belonged to my wife's grandmother, who died in the 1970s. I've divided it into several plants for my daughters, and it's doing okay. They get old looking, and I've nursed one or two of them back from the brink once or twice, but they still flower.
I've never considered an outdoor phase for them. I should.