Can you give me any reason why somebody would buy a TB device instead of USB 3 device when connecting single drive (HDD, SSD, memory card, Ethernet adaptor), even if TB were on every computer and would cost the same as USB 3?But right now, it is turning into USB 3.0 and no Thunderbolt at all.
If for 95% of current devices (who knows about SSD speed in the future) and for only using one or two devices at a time, USB 3 is not slower than TB, TB would not be chosen by the majority even if it did cost the same.
So, the price is not helping TB but even at equal price only a minority would buy it.