Answer: Snake plants are sometimes called cast iron plants because they adapt to almost any growing environment and are rarely bothered by any pest or disease. The only thing that will cause sure death is soggy soil. I suspect you overwatered your snake plant which caused the roots to rot. Rotted roots will result in sudden collapse of the plant.
Snake plants like soils on the dry side and this is especially important during the winter months when they barely grow at all. If you replace your snake plant, be sure to plant it in sandy, gritty soil (like a cactus mix) to ensure fast drainage, and water it sparingly, especially during the winter months. Once you get to know your plant you'll be able to tell by looking at it whether or not it is thirsty. The normally bright and shiny leaves will take on a slightly dull appearance. That's your signal for watering thoroughly.
Best wishes with your new snake plant!
Q&A Library Searching Tips