Some ways to know it's time to replatform to Magento:

• Does your current platform limit some features or functions that are necessary to grow?
• Was your current platform built from the ground up and now it's time to move to a more current platform?
• Does your business staff spend most of their time keeping the current platform stable instead of doing what they were hired to do?
• Does your business need to be on a platform that can bend and turn as your vertical changes?
• Does your business need another technology platform that cannot connect with your current eCommerce platform?

If you answered yes to one or all of these questions, then it's time to consider a replatform to Magento.