Partially false. The motor is physically maxed out. However, updates can change when the motor engages. Some updates make Auto mode more aggressive on carpet, making it feel like more suction.
Once the file is transferred, the V15’s LCD screen will go dark and then display a progress bar (0% to 100%). This can take 5 to 15 minutes.
There are unofficial, highly technical projects in communities like GitHub focused on custom firmware for Dyson Battery Management Systems (BMS).
If your vacuum is acting glitchy—such as the motor pulsing or the LCD screen showing incorrect data—you can perform a hardware reset that often clears "software-like" issues: