I am fascinated by the diversity of succulents and the many different plants in this category. There are so many different types of sedum, each with its own unique characteristics. Learning about these plants is an ongoing adventure.
Here are some links for you to learn more about them:
Wikipedia - Succulent Plants - https://en.wikipedia.org/wiki/Succulent_plant
Succulent Sprite - 100+ Types of Succulents with Pictures and Names - https://thesucculentsprite.com/succulent-types-with-pictures/