Why are usb hubs only available up to 7 ports? [closed]
Why should the theoretical port number be limited to only seven ports? There are hubs with more ports on the market.
Look at this monster example: 49-port USB hub is just plain practical
(source: crunchgear.com)
I think the main issue is power.
I'm not going to look up the technical numbers and figures, but if you put too many devices on a hub, The USB port won't be able to supply enough power to all the devices.
Here is a USB hub with 16 ports (8 on each side) and it uses an external power source.
edit: the 13 port hub posted earlier also has an external power supply...