There are several reasons for the shift of the template of my old blog on Blogger from a dynamic view to a static one.
Dynamic view takes too much time to load. This greatly slowed down my editing process on Blogger.
Integration with other scripts
It is often quite troublesome to load other scripts using the dynamic view.
As I’m not a web developer or a web designer, it’s not worth spending so much time to goggle the solution. In contrast to the difficulty of installing external scripts in the dynamic view, the static view enables users to click “Layout” → “Add a Gadget” to do the job.
By doing so, the user doesn’t need to edit HTML template every time.
More reasons can be found on 10 Reasons To Avoid Blogger Dynamic Views.