Is there a limit to the number of Practice Scripts I can create?

No, there is no limit to many Scripts you can create.

While there is no limit to how many Practice Scripts you can create, you will only see a max of 5 scripts showing on your account at any time. This is because once you create your sixth Practice Script, your oldest one is automatically moved to the Practice Archive. You can access and restore archived Scripts at any time by clicking the "View Archive" button in the upper right corner of your screen while in the "Practice Scripts" tab.