Right, to give out test data on variegation (some are non succulents)
->agave americana:permanent
->several cacti species(ferocactus, astrophytum, gymnocalycium):permanent
->yucca gloriosa:permanent
->aeonium kiwi: unstable
->portulacaria afra:permanent
->kalanchoe subtype bryophyllum leads to sterile leaf clones
->dracaena :unstable on corn plant(large leaf fragrans), stable on reflexa and "malaika"
->naturally occurring on malva sylvestris, annual
->potentially unstable in scheflera
-> unstable in crassula ovata cultivars
So...rule of thumb, rosette growing plants lose it easier, if its not deep within the tissue
