I am not sure a template system would work to be honest. Not every page would need every component and one of the benefits of using Wappler is having stream-lined pages that are not bloated.
Wappler does offer the ability to auto-add the frameworks to the pages so you do not have to remember to do that, which is a definite plus.
I believe (but I could be wrong), that an alternative to a template system would be to use SPA. If I understand it correctly, the components would be added on the main SPA page and the content pages would refer back to the main SPA page so that the components are only added once.
We still have some work on this
Also - when this is finished for NodeJS we will probably continue integrating template pages with PHP in a similar way.