Ecommerce is a dynamic business. Buying behaviors change, products change, and your online store needs to change to keep up. As you grow more successful, your traffic increases, as well as demand on your resources.
Your current ecommerce platform may need to modernize, to meet new customer expectations. Or it may be too costly to maintain. You may just want a fresh start using the things you have learned up until now.
Either way, changing ecommerce platforms can boost sales, increase performance, and lower costs. So long as you take the proper measures to ensure a smooth transition.