In a perfect world, yes. Unfortunately, we live in a world that is FAR from perfect.
If your assumption were true, why will a PT with a Premium carto not work on the built-in port (on the side) of my work laptop, but work perfectly well on the same laptop's port replicator? On the built-in port, I get a message that a USB device is using too much power and the port is being shut down.
This laptop is a business class machine from a high-end manufacturer. The port replicator is from the same company and is designed specifically for this laptop.
I'm not trying to slam you. Just pointing out that your assumption does not hold up to nearly 40 years of professional experience.
Well i have used them on laptops and desktops no probs, I guess I just haven't used any premium carto's, but I thought I did, must be a middle model carto...