Illogically, I've gone back in time and wrote the Drupal 6 version of this module. Not all of this works, not all of it ever will but it supports autoloading of webcomponents it finds. It also supports autoloading polymer and one page apps.
This now means elements can be developed and deployed against Drupal 6, Drupal 7 and Backdrop. Now for Drupal 8 and beyond..
The following important issues have been backported from the 7.x-1.x branch of the Memcache module. Please test in your development / QA / staging environments and provide feedback.