An example of a complex project that uses this method is Brownie: No constant USB tethered uploading to the M5Stick is required with this method. Instead of constantly uploading to the M5Stick directly, you simply put your projects on multiple SD cards and swap them into the M5StickV as needed. You can build a multi-file project, save it to the SD card, naming the main python file boot.py and the M5Stick will detect the SD card and run your code on boot.
Think of the Micro SD card as a swappable hard-drive for your M5Stick. Using the MaixPy IDE you can easily try out simple scripts and save them to the M5StickV internal storage so they start on boot. The M5StickV boots and runs the script boot.py located in internal storage. M5Stack provides you the hardware, but firmware updates, IDE, documentation, examples all come from Sipeed/MAIX. M5StickV is made by M5Stack, but follows the standard hardware as defined by Sipeed/MAix. 
Fat32 formatted micro SD cards only work with the latest MaixPy firmware.When plugged into usb it will perform a reset only. Long-press the small button closest to the usb port to turn off.Maybe useful for expert embedded hardware programmers:
_iwdDnRJJGB.png "arduino camera in brownie")
In-depth information about the hardware like audio file formats, RAM address locations, etc.
Example of a complex project that uses the SD card as it's main storage. Example pulling information from the Power Management Unit (apparently undocumented):. Complete demo script that comes with the M5StickV default firmware:. Scroll down to the "MODULES/LIBS" section: Overview along with Module/Lib information. ARDUINO CAMERA IN BROWNIE UPGRADE
Upgrade the M5StickV firmware using the XXXXXXXm5stickv.bin file from the latest directory, like maixpy_v0.4.0_39_g083e0cc:. I'll keep updating this post as more information becomes available.
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