Ford changed a few models to OAT, then backed away from it. VW, Audi, and Porsche are OAT users, too, but most others have resisted. Instead of OAT, most new cars now use a hybrid antifreeze that's formulated with both OAT and the silicate inhibitors from green (Japanese hybrids have different inhibitors). It comes in too many colors to pretend this type is color-coded.
Previously the USB port on the back of the device was locked down and couldn't be used for storage devices, but thanks to the recent updates, additional storage space can easily be added via a USB flash drive. Note that this update is for the Fire TV box only.
The Fire TV box, due to its design and more powerful hardware, gets the more interesting updates. First, it will now have access to external USB storage. By connecting a USB stick to the Fire TV, you can save additional apps and games. This should be especially useful, as some Fire-compatible games can take up a lot of space. But unlike the rival Roku 3, Fire TV will not be able to play video and music files stored on an external drive.