We are currently running a series of scripts once a year (or possibly more) when Samsung updates their developer theming engine. Not all of the colors, fonts, and theme elements directly translate year over year so we created a somewhat automated system to go in and update them for us.
We have several thousand themes stored in google drive.
We have a process using UI-Vision and AutoIt to run through a series of actions ultimately updating the themes, but this process can take 1~2 weeks.
Our goal is to store all of our assets on something like AWS, as well as perform all of the necessary functions in the cloud as opposed to our local machines.