Ubuntu will never have an unlimited amount of USB drives as you will hit hardware limits before you reach 127 devices on the USB bus.
It has been stated before that there is NO way to get around the 127 device limit. Some people tried getting close and failed. Reference this thread on the forum:
Someone tried 100+ USB drives and failed. Adding PCIe USB host cards didn’t solve it. Recommended solution on that thread was to get a server or NAS or storage box and just take all the drives out of the cases/shells/USB adapters and put them in the NAS or server or storage box instead.