Allow adding system memory by inserting a USB flash drive.
For new features requiring more storage/memory, maybe a large USB drive could be inserted into one of the USB ports. Flash drives are available at least 1TB now. That should store about anything.
A very cheap way to add memory for memory-intensive features (download Google map files, voice recognition, etc.)
Moderator: Currently the car has 16-32 GB of memory, which seems to be sufficient for all the current features. MCU2 jumped to 64 GB of memory.