Ultimately, the level of flexibility required for a particular dance style depends on the specific movements and techniques involved in that form. Some styles, such as rhythmic gymnastics and acrobatics, require extreme levels of flexibility, while others may only require moderate or basic levels.
Overall, while flexibility can be an asset for many types of dance, it is not necessarily a prerequisite for all dance styles. Dancers should focus on developing the skills and techniques that are specific to their chosen dance forms and work on their flexibility to the extent that is necessary for those styles.